In Black Ops II in hardcore shooting your teammates too much would put you in a temporary probation for shooting your teammates too much. Ghosts has fixed that by making it so you kill yourself instead of your teammates.
Ghosts for playstation 3 has a different problem. When the person hosting rage quits it causes the whole game to lock up. Until they fix that problem people who cause this lock up need discouragement. I propose putting people with a history of quitting on probation that will keep them from playing any other game for a set time period. The same that would happen in BO2 if you kept killing your teammates.
Game freezing is incredibly frustrating and this seems like the easiest temporary fix.