Anything can be taken to court. I expect, in general, people get mad at the person who broke the rule, they don't get invited back to future iterations, and the

Anything can be taken to court. I expect, in general, people get mad at the person who broke the rule, they don't get invited back to future iterations, and they suffer reputational damage. When I've been in that sort of situation, the rule is made clear and no one breaks it--at least publicly.