No food in the arcade and no climbing on the machines. That's about it at my place.
I was way more hysterical when I first started collecting. It took a year or so before I realized the games were built for abuse and won't be harmed even with hard play. Now if a kid is really being abusive, like kicking the coin door, I'll point it out to their parent and not invite them back. If an adult is being abusive I'll just ridicule them for acting more juvenile than the kids.