I find all this talk of Anon as an organization to be very amusing.
the whole point of Anon is really just a status on 4chan and it's spin offs. Anyone who posts anonymously, is an Anon.
this anonymous community is composed of all members, and none. Anyone who posts anonymously. But they arent an organization.
Only when a bunch of Anons got together to form Project Chanology did they gain any semblance of an organization. And even then it was really just protesting while hiding their identity.
I blame whatever group of Anons started the chanology website for strengthening the notion of them as an organization. (an idea already in place ever since Fox new' report of them as "hackers on steroids" )
In MY opinion, Sony is just using them as a scapegoat to place the blame on.
relevant-
http://www.escapistmagazine.com/videos/view/extra-credits/3350-Anonymous