I think you need a better argument as to why people should be limited to the amount of characters they can put in a game other than "Their PC is better than mine." I'd focus more on the issue of how well the server can handle the load. For instance, how would it affect everyone else if, for example, five people had 8 toons each in their own games. Would this decrease performance for everyone else connection-wise across the board? Or do these idlers have less impact on the server as opposed to one who is running?