Seems easy to me! Ban the obnoxious players! Yes, they might come back, as with one that is now playing under a different nic. If that person has changed his behaviour, then thatís fine.
So, it appears simple to me. Ban the rude players, who seem also to be the ones that never thank the hosts when leaving. They behave like spoiled children who need attention from displaying very poor behaviour.
Enough already that in such a small league, the few instigators are not thrown out, so that the rest of us can enjoy a fun evening playing cards.