It's pretty simple. Two combatants duke it out. The loser by boom or flee must leave. No need to make it complex. Unfortunately there is no way to MAKE someone adhere to the rules. Example: I think MOST people would agree it's best to wash your hands after visiting the restroom, but hey... some don't. Result: nasty hands.
When you witness a blatant violation you have a few choices:
a)kindly inform the person, b) report the person, c) chalk it up to not worth your time, wash your hands and move on.
Trial by forums is not a good idea, mob rule mentality doesn't work here. If you feel like ya can't let it go, I suggest option "b" Then move on and enjoy.