It hasn't been confirmed to be Anon. Last I heard some Anon members were posting on Facebook that they did it, than would go on another sight and state that they never did it. I saw on G4 that there have been a couple speculations on what could possibly be causing the PSN errors. I'm not so much as worried as I am pissed off. If some [censored] hacker(s) IS/ARE actually causing this than he can go to hell for ruining other peoples fun for his/her/their own amusemant.
I agree, it's ridiculous what other people will do to get rid of other people's fun, and in this case millions.
edit: Anon is serious when it comes to [censored] with peoples life's though. And in some cases it is justifiable, a few years back there was this little kid on Youtube, who bullied a cat, http://www.google.com/#hl=en&sa=X&ei=gr6zTcHxJeuP0QGAmY2YCQ&ved=0CBQQBSgA&q=anonymous+vs+kenny+glenn&spell=1&bav=on.2,or.r_gc.r_pw.&fp=38378e84586d88e6.
http://www.pcworld.com/article/226073/anonymous_for_once_we_didnt_do_it.html They say they didn't do it, and I believe them they usually take full responsibility in [censored] they [censored] up.