Perhaps instead of bans, you give out temporary bans, like in some sports.. a minor problem would be a warning, then a first actual offense is a one day ban, then a 2nd offense is a week's ban, and then perhaps a third offense is a year's ban? Anyone who would come back and then do something stupid after being banned a year could then be classified under a level 4, which would be a ban for life.

Still, the question would be, what warrants a ban, even for a day?

Take care all.