there was a cousin of one of my haunting brothers that got stoned and went to a professional haunt looking to pop someone, he hit the first guy to pop out, two minutes latter, three big guys dressed all in black descended on them, and tossed them out the back door when they were done. they never tried that again.....
I have one paid participant in my whole haunt and thats an off duty cop working security, if it intentional, we will press charges. but sometimes thats hard to determine, (I like the hulla hoop rule I read) some haunts just use Bouncers instead of cops. that must have been what happened in my urban story