Sony sued Geohot, a hacker who released a jailbreak of the PS3, and accused him of copyright infringement. Sony is now suing Geohots and other hackers for the same case. The operation is to DDoS Sony’s websites, as a form of protest. The judge of the case has given Sony permission to view the IP addresses of everyone who visited geohot.com Sony are also after another group of hackers. DDoS’ing each of their sites will attract a lot of attention and increase the number of targets.
Source: https://thehackernews.com/2011/04/anonymous-takes-down-sony-pictures-us.html