http://en.wikipedia.org/wiki/Anonymous_%28group%29#2011In January 2009 members of Anonymous targeted California teen McKay Hatch who runs the No Cussing Club, a website against profanity. As Hatch's home address, phone number, and other personal information were leaked on-line, his family has received a lot of hate mail, lots of obscene phone calls, and even bogus pizza and pornography deliveries
On May 20, 2009, members of Anonymous uploaded numerous pornographic videos onto YouTube. Many of these videos were disguised as children's videos or family friendly videos with tags such as "Jonas brothers."
In December 2010, the document archive website WikiLeaks (used by whistleblowers) came under intense pressure to stop publishing secret United States diplomatic cables. In response, Anonymous announced its support for WikiLeaks, and Operation Payback changed its focus to support WikiLeaks and launched DDoS attacks against Amazon, PayPal, MasterCard, Visa and the Swiss bank PostFinance, in retaliation for perceived anti-WikiLeaks behavior.
The website for the Irish political party Fine Gael, a centre right party and currently the Republic of Ireland's largest opposition party, was hacked by Anonymous according to TheJournal.ie.
...members of the group Anonymous hacked the website of HBGary Federal and replaced the welcome page with a message stating that Anonymous should not be messed with, and that the hacking of the website was necessary to defend itself. Using a variety of techniques, including social engineering and SQL injection, Anonymous also went on to take control of the company's e-mail, dumping 68,000 e-mails from the system, erasing files, and taking down their phone system.
Without getting into the rationale behind each of these actions, when one advocates or cheers for vigilante activity on the internet against groups with which they disagree their protestations ring hollow when groups they favor fall victim to the same vigilante-style tactics.
:shrug: