As far as interoperating community-run servers: cheating is the first thing that comes to mind. A lot of restrictions in MMO's are not so much for DRM as they a

As far as interoperating community-run servers: cheating is the first thing that comes to mind. A lot of restrictions in MMO's are not so much for DRM as they are for maintaining fairness in the game, or preventing people from destroying the in-game economy.