Peter Gibson is one of the guys behind 'Operation Payback' which targeted major companies like PayPal and Visa with a series of DDos attacks and that he admitted his role in the said conspiracy.
He is banned from using the name "Peter" on the internet.
He was involved in the administration and maintenance of an IRC server that was 'used as a forum for conspiratorial discussions for Anonymous operations and attacks which could and did take place.
http://www.dailymail.co.uk/news/article-2236990/Cyber-gang-accused-hacki...
http://nakedsecurity.sophos.com/2011/09/07/anonymous-suspects-bailed-ban...