And those claiming responsibility has said along the lines of this~ "Sony has made a lot of money from our purchases and doesn't do enough for its users, stop the greed" which kind of shows the motivation behind it, they also mentioned "planting the isis flag on Sony's servers" which was even worse. Comparing Sony to the likes of isis lol...

Lets hope an extremely skilled hacker takes on a vigilante cause to seek and destroy their computers =D (rages internally)