Brigading is the coordinated mobilisation of many users to swamp one target - a post, a product rating, a creator's channel, a business listing - with votes, reviews, comments or reports, so that its apparent standing shifts or its owner is pushed off a platform. The participants are frequently real people using real accounts. That separates it from fake-crowd tactics and explains why platforms struggle to police it: each act, one downvote or one star, looks like ordinary behaviour. Only timing, shared origin and common purpose give it away.

For marketers the term matters because brigades land on surfaces where commercial decisions are made. A star rating decides whether a listing is clicked, and a dislike ratio colours how an advertiser's video is read. Each signal assumes that the crowd behind it formed independently.

How a brigade works

The sequence is similar on most platforms. A trigger gives a community a reason to act: an executive's remark, an exclusivity deal, a moderator's ban. A call to action follows, usually a post in a forum, subreddit, Discord server or social thread that links to the target. Execution takes hours rather than weeks, in the form of votes, one-star ratings, comments or mass reports. Detection then weighs velocity against a baseline, account age, whether reviewers bought or played the product, and whether the text is off-topic. The response may be removal, exclusion from the aggregate score, a publication delay or a label.

There is no buy side or sell side in the programmatic sense. Three roles recur instead: organisers, participants and defenders, the last being platform trust and safety teams, moderators and the target itself. A 2018 study by Srijan Kumar, William Hamilton, Jure Leskovec and Dan Jurafsky covered about 36,000 Reddit communities. According to the authors, fewer than 1% of communities started about 74% of the mobilised conflicts, in which members of one community descend on another, and highly active members tended to initiate them while less active members carried them out.

Origin and evolution

The word comes from the French for a body of soldiers, according to Know Your Meme, and attached itself to online voting as Reddit grew. The site records a February 7, 2014 post in r/TheoryOfReddit arguing that brigading should not count as vote manipulation, and an April 30, 2014 question in r/OutOfTheLoop asking what it meant. Its entry is crowd-sourced and the earliest uses are undated, so those dates mark arrival in public debate, not coinage.

Storefronts and review sites met the problem in rating systems. On September 20, 2017, Valve added histograms to Steam reviews so that shoppers could see when sentiment swung; Game Informer cited the flood of negative reviews on Firewatch as an example. On March 15, 2019, Valve went further, according to TechRaptor: reviews judged "off-topic", such as those about DRM or licence changes, are excluded from the displayed score for the flagged window but stay readable. Metro 2033 and Metro: Last Light had been review-bombed after Metro Exodus took an Epic Games Store exclusive.

Film and media sites followed. On Captain Marvel's opening day in March 2019, its Rotten Tomatoes audience score stood at 33% from more than 58,000 reviews, the Hollywood Reporter said, after the site had barred pre-release comments. Metacritic introduced a 36-hour wait for new-game user scores on July 20, 2020, after review-bombing of The Last of Us Part II. Amazon held user reviews of The Lord of the Rings: The Rings of Power on Prime Video for 72 hours in September 2022, aiming to filter bots and trolls.

Harassment took a different form. On September 10, 2021, Twitch sued two users it accused of organising "hate raids", floods of bot-driven accounts posting abuse in streamers' chats. On November 10, 2021, YouTube made dislike counts private, saying smaller channels were targeted more often.

The law arrived separately. The European Union's Omnibus Directive bans fake reviews and obliges review hosts to check them; national rules were due by May 28, 2022. The US Federal Trade Commission announced its final rule on August 14, 2024, covering fake and bought reviews, insider reviews, review suppression and purchased followers or views. It took effect on October 21, 2024, with civil penalties of up to $51,744 per violation. The UK followed with a fake-review ban in April 2025. Each regime is framed around commercial conduct - buying, commissioning, publishing or suppressing reviews - rather than unpaid crowds.

Why it matters for marketers

Google removed or blocked more than 292 million policy-violating reviews in 2025, about 22% of review activity on Maps, according to its April 2026 Trust and Safety Report. The total covers every kind of violation, so it says nothing about brigading specifically. Google's Maps policy does bar unusual volumes or patterns of reviews meant to shift a rating, and PPC Land's coverage of Google's review-reward survey noted that customer-facing businesses can face targeted negative campaigns, sometimes coordinated or tied to public controversies.

As of April 2026, sellers said buyers threaten one-star feedback unless refunds or free products are offered. Amazon's order defect rate threshold is 1%, so at low volumes a single negative can breach it. The report described individual buyers, not organised campaigns, but small catalogues have little room to absorb a coordinated burst.

Advertisers face the reputational side. When YouTube removed the dislike button from Shorts on June 25, 2026, it cited simpler feedback controls. PPC Land's report noted the older argument that dislikes had been misused for brigading, and offered no data on how often.

Supply is cheap. In a NATO Strategic Communications Centre of Excellence experiment, more than 30,000 inauthentic accounts delivered over 100,000 engagement units for about 252 euros, and four weeks later most platforms had left most of it in place. The study concerned purchased engagement, not brigading as such, but it shows what bulk activity costs to hire.

Limitations and disputes

The central dispute is where protest ends and manipulation begins. Valve's test is relevance: reviews about topics it considers irrelevant to future buyers are set aside. Andrew Wirzburger of the University of Michigan's Inter-university Consortium for Political and Social Research argued in Tech Policy Press on July 17, 2026 that review bombing is political dissent carried out in consumer spaces, and that vague platform terms such as "rating manipulation" blur dissent and harm. In September 2026, Steam restored the original score of Hearts of Iron IV after a campaign against Paradox Interactive's strategy games, according to Strategy and Wargaming, whose account of the trigger is secondhand.

Evidence is thin. Platforms publish removal totals, not brigading counts. Reddit said in June 2026 that it revokes nearly 2 million inauthentic votes a day, a figure that PPC Land's report did not break down by method.

Attribution is hard because ordinary behaviour and brigading share the same actions. Reddit's help page, updated on May 19, 2026, lists organised groups coordinating votes against a post, a user or a domain as a violation, yet permits downvoting off-topic content in one's own community and asking communities one has not joined for advice. The line is organisation, not numbers. The page does not use the word brigading.

Defences cut both ways. Delays treat every early reviewer alike, including honest ones. PPC Land noted that Reddit's planned reporting tools carry a risk: bad actors could file reports to trigger verification demands against minority views. Tools for removing abusive reviews can remove honest ones too. German businesses were reported in August 2025 to be filing mass defamation complaints, on largely anecdotal evidence. Google Maps began showing removed-review counts in Germany in April 2026, such as over 250 removals on a restaurant with 3,270 reviews, without saying whether those reviews were legitimate.

Brigading and adjacent terms

Glossaries often group brigading with astroturfing, sockpuppetry and shilling under the idea of faking a crowd. The grouping is useful but imperfect, because a brigade is often a real crowd with a pointer.

Astroturfing disguises a funded campaign as spontaneous opinion, as PPC Land's explainer sets out; the deception lies in the hidden sponsor. A brigade is frequently open about its organisers and run by unpaid volunteers.

Sockpuppetry is one operator controlling many fake identities, covered in Explaining sockpuppet. A brigade can consist of many distinct real people, though sockpuppets or bought accounts are sometimes added to swell it.

Shilling means a planted accomplice posing as an independent party, as with seller-linked bids in an auction, covered in Explaining shill bidding. It inflates a result from the inside, where a brigade overwhelms one from the outside.

Review bombing is brigading applied to ratings. The wider term also covers votes, comments, reports and live chat.

Recent developments

As of October 2026, platform activity centres on bots and review integrity. On March 25, 2026, Reddit's chief executive Steve Huffman said that about 100,000 bot accounts are removed daily and that permitted automation would carry an [App] label.

Google's changes concern mainly fake and incentivised reviews. On April 17, 2026, it banned staff quotas and staff-name mentions in Maps reviews, a day after saying Gemini models would block review extortion scams. On July 24, 2026, it added a structured-data guideline that prohibits fake reviews and undisclosed incentivised reviews, with manual action as the penalty.

Networks of fake accounts remain a separate category. Google's Threat Analysis Group terminated over 9,800 YouTube channels in the second quarter of 2025, and Meta explained its use of the phrase coordinated inauthentic behavior in a December 6, 2018 post. Steam's handling of the Paradox campaign in September 2026 reopened the argument over who decides what counts as relevant criticism.

Timeline

  • February 7, 2014: A Redditor argues in r/TheoryOfReddit that brigading should not count as vote manipulation
  • April 30, 2014: A r/OutOfTheLoop post asks what vote brigading is
  • September 20, 2017: Valve adds review histograms to Steam
  • March 9, 2018: Kumar, Hamilton, Leskovec and Jurafsky post their study of conflict between Reddit communities
  • December 6, 2018: Meta publishes its explainer on coordinated inauthentic behavior
  • March 8, 2019: Captain Marvel opens in the US and its Rotten Tomatoes audience score is flooded with negative reviews; the site had earlier disabled pre-release comments
  • March 15, 2019: Valve announces its off-topic review activity system for Steam
  • July 20, 2020: Metacritic introduces a 36-hour wait before user scores appear for new games
  • September 10, 2021: Twitch sues two users over hate raids
  • November 10, 2021: YouTube makes dislike counts private
  • May 28, 2022: Deadline for EU member states to bring Omnibus Directive rules on fake reviews into force
  • September 2022: Amazon applies a 72-hour delay to user reviews of The Rings of Power
  • August 14, 2024: The FTC announces its final rule on fake reviews and testimonials
  • October 21, 2024: The FTC rule takes effect
  • April 2025: The UK fake-review ban under the Digital Markets, Competition and Consumers Act comes into force
  • September to November 2025: NATO researchers buy engagement from ten providers across seven platforms
  • March 25, 2026: Reddit announces bot labelling and verification changes
  • April 16, 2026: Google's Trust and Safety Report reports over 292 million policy-violating reviews removed or blocked in 2025
  • May 19, 2026: Reddit updates its help page on disrupting communities
  • June 16, 2026: Reddit discloses nearly 2 million inauthentic votes revoked daily
  • June 25, 2026: YouTube removes the dislike button from Shorts
  • July 24, 2026: Google adds a structured-data guideline on fake and undisclosed incentivised reviews
  • September 2026: Steam flags review bombing of Paradox Interactive's strategy games

Summary

Who. Organisers and participants are communities of users, often real people, with platform trust and safety teams, moderators and the targeted brands, sellers or creators on the defending side. Regulators in the EU, UK and US police related fake-review conduct.

What. A coordinated surge of votes, ratings, comments or reports aimed at distorting or silencing a target. Platforms respond with score exclusions, publication delays, removals and labels.

When. The term spread with Reddit's growth and was in public debate by early 2014. Platform countermeasures date from Steam's histograms in September 2017, with the major legal rules on fake reviews arriving between 2022 and 2025.

Where. Review sites, game stores, social platforms, video services, marketplaces and local listings such as Google Maps.

Why. Scores and counts steer purchasing and visibility, and a coordinated burst can move them quickly. Whether a given burst is manipulation or legitimate collective protest remains disputed, and the published evidence on how often brigading occurs is thin.