oh come now anonymous, there are more companies than just Sony supporting the SOPA(MS and NInteno included) probably butt-hurt that their previous hacks didn't bring Sony to their knees as they thought it would.
Anonymous is a bit like a rabies infested puppydog that is angry and likes to bark a lot. Probably not that big of a threat, but if you fall asleep, you will get infected. It has not butt, there isn't a butt-hurt. What you see with Anonymous, and other organizations born out of the Internet age, is loose associations of people with common interests that act in coordinated manner from time to time, with one member announcing an initiative and others either following with it or not. There is no leadership or anything driving it.