I have a couple signs onthat I post saying
NO FOOD OR DRINKS PLEASE! Never had a problem since I began using them. When folks come up on the stage while I'm playing, I hit the kill switch and tell them politely to get the hell off the stage and I'll be more than happy to talk with them during a break.
One of the reasons I no longer play weddings and nite-clubs is because of the drunks and cigarette smoke. Since I've vacated that environment, the problems seemed to just melt away.

Gary
_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)