I have no problem with aggressive nudging, sliding the game (if on a slick floor). This doesn't hurt games. I DO have a problem with people slamming their fists on the glass or lockdown bar, kicking the coinbox, kicking the legs, picking up the game and slamming it down.

I have been to a few tournaments in a city in our state and there are a handful of guys that continually abuse the machines. The do many of the things listed above and I always hope those guys don't come down to our tournaments.

A few people I know do this and it always amazes me that they don't tilt more because that bob has to be swinging the entire time they are playing.

ah well, these people physically shove the machine forward EVERY TIME they flip. It isn't violent or anything but the backbox is always wiggling from it.