Yeah, what ObsessiveMathsFreak said, and by the way, this is a problem for developers. A lot of kiddies buy a game and share it with 4 other people using shared PSN accounts. People solicit strangers to share games using these accounts, so developers are starting to realize for every copy of a game they sell, they could be selling more if this were not a feature of the PSN. Also, your purchases are associated with your account, so if your PS3 fails, you don't lose access to anything. Furthermore, your saved games can be backed up and are not tied to your hardware so if you do need to replace it you can transfer everything intact to the new system. This is how/why people make saved games available online. Not sure where these people are getting their info, but all you have to do is a Google search to find out how to solve these problems.