http://www.google.com/search?client=...=Google+Search
While he's not guilty of piracy, copyright infringement, etc himself, he made it much easier for people to do those things. Knowingly facilitating a crime is a crime. If a bank robber didn't know how to get into the vault, and I come along and show him, that makes the robbery possible whereas it wasn't before. If I take a mandated governor off a vehicle and then the owner uses the vehicle to outrun the police, I facilitated the get away.
You can't just take someone to court to get a restraining order. It doesn't matter how rich or influential you are...there are steps that have to be taken beforehand, which means there's more to this story than has been told. I would almost bet that geohot has been baiting Sony for a while and wanted the situation to escalate for publicity. I'm not sure if he expected to get sued or not, but it's not like Sony is going to get anything out of a young kid anyway. The lawsuit is just so Sony can prove a point, and that is "If you even think about slightly destabilizing our profitable system, we'll crush you."