I have a friend that got a PS3 a while ago. He bought it from a friend. He wants to play it online but is concerned that the friend that he bought it from may have acquired it, and a couple others, in not such a legal way. My question is...if he was to go online or play online games, is it possible for Sony to trace the serial number of the unit and either disable the unit or take other legal action. He doesn't know if it was stolen for sure, but more of a just in case.