A popular target for organized raids by Anonymous is Habbo, a popular social networking site designed as a virtual hotel. The first major raid is known as the "Great Habbo Raid of '06," and a subsequent raid the following year is known as the "Great Habbo Raid of '07."[17] The raid actually predates and was not inspired by the news of an Alabama amusement park banning a two-year-old toddler affected by AIDS from entering the park's swimming pool.[18] Users signed up to the Habbo site dressed in avatars of a black man wearing a grey suit and an Afro hairstyle and blocked entry to the pool, declaring that it was "closed due to AIDS,"[17][19] flooding the site with internet sayings,[19] and forming swastika-like formations.[19] When the raiders were banned, they complained of racism.[19] In response, the Habbo admins often ban users with avatars matching the profile of the raiders even months after the latest raid.[citation needed]

According to white supremacist radio host Hal Turner, in December 2006 and January 2007 individuals who identified themselves as Anonymous took Turner's website offline, costing him thousands of dollars in bandwidth bills. As a result, Turner sued 4chan, eBaum's World, 7chan, and other websites for copyright infringement. He lost his plea for an injunction, however, and failed to receive letters from the court, which caused the lawsuit to lapse.

On December 7, 2007, the Canada-based Toronto Sun newspaper published a report on the arrest of the alleged Internet predator Chris Forcand.[21] Forcand, 53, was charged with two counts of luring a child under the age of 14, attempt to invite sexual touching, attempted exposure, possessing a dangerous weapon, and carrying a concealed weapon.[22] The report stated that Forcand was already being tracked by "cyber-vigilantes who seek to out anyone who presents with a sexual interest in children" before police investigations commenced.[21] A Global Television Network report identified the group responsible for Forcand's arrest as a "self-described Internet vigilante group called Anonymous" who contacted the police after some members were "propositioned" by Forcand with "disgusting photos of himself." The report also stated that this is the first time a suspected Internet predator was arrested by the police as a result of Internet vigilantism.[23]

Following allegations of vote rigging after the results of the June 2009 Iranian presidential election were announced, declaring Iran's incumbent President Mahmoud Ahmadinejad as the winner, thousands of Iranians participated in demonstrations. Anonymous, together with The Pirate Bay and various Iranian hackers, launched an Iranian Green Party Support site called Anonymous Iran.[67] The site has drawn over 22,000 supporters world wide and allows for information exchange between the world and Iran, despite attempts by the Iranian government to censor news about the riots on the internet. The site provides resources and support to Iranians who are protesting.