I have done it once. Hardest part was watching some people smacking my game around. It was only a few and they did it to a lot of the other games. So, I set the tilt pretty tight to discourage death saves and other big moves. There is never an excuse to rage tilt on a machine that is not yours and that someone was nice enough to bring to a show. But, that being said, there was no damage after the show and it was cool feeling that I was part of the show. Planning on doing it again.