well.... the limit could be a counter that is relative to the negative feedback but not the number of neg. feedbacks itself. I mean that counter can be reseted after a while or by an administrator if the reason given by the owner is good enough.

For instance, let's say you accumulated too many ...

what about a restriction on joining games based on the negatives feedback ?

For instance, a player with a certain amount of negative feedbacks, something like 15-20, should not be able to join any public games. That could avoid games screwed up by just 1 player (what can annoy up to 5 other ...