As I already told you before, I find the idea of accounts based on LUIDs to be not so good, for those, like me, who often use different devices. But, with a little change I think that this counterproductive system can turn quite useful to discourage bad sports. My idea is the subsequent: first thing first storing the first LUID a player uses and when a player tries to access with a different LUID, must take additional steps to confirm ownership of the account, and so every additional confirmed LUID must be stored/linked to the account. In this way, when a spoilsport is thrown out of the server, all the other LUIDs can be flagged and do whatever one feels like with them. So in substance a spoilsport can still join, but he will not be allowed to use his account with any device, and if he wants to play he's forced to register a new account and start grinding stats from the beginning again. Quite a deterrent, aye?