I think most people are butthurt cause they are being "drafted" if you will, without their consent. (I know anonymous didn't do this attack, this is for previous times when ANY hacker attacked PSN) The hacker attacks them, which in turn loses connectivity for some/all users depending on the size of the attack. Those people then call Sony pissed off, not because they support the hacker, because by then, believe me, they would rather strangle the hacker, but because they cannot connect. Which then frustrates and bogs down Sony even further. These innocent people are being forced to contribute congestion Sony's way, without even wanting to be a part of it. I think its sorry ass terrorism. Just my $.02.
If you want to F with them, make the PS Store give out free games, so people enjoy the hacker screwing with Sony.