Last week, Aaron Barr, a top executive at computer security firm HB Gary, boasted to the Financial Times that his firm had infiltrated and begun to expose Anonymous, the group of pro-WikiLeaks hackers that had launched cyber attacks on companies terminating services to the whistleblowing site (such as Paypal, MasterCard, Visa, Amazon and others). In retaliation, Anonymous hacked into the email accounts of HB Gary, published 50,000 of their emails online, and also hacked Barr's Twitter and other online accounts.
The next day, February 6, the attacks turned serious, and Barr realized the extent of what Anonymous had done to him and to his company, which was currently in negotiations to sell itself to a pair of interested buyers. This was no longer a game; it looked more like war. The sheer freewheeling raucousness of what follows illustrates as well as anything the nature of Anonymous, and it's worth quoting at length. (A few unimportant bits have been stripped for clarity, denoted by an ellipsis.)
[23:53:49] q> Ohai CogAnon
Enjoying the Superbowl, I hope?
CogAnon: only that your research like totally failed and all your info was bullshit
[23:56:25] c0s> CogAnon: that article was a hit peice.