I haven't seen the show on for a while, not sure it's still on, but I saw a "Mystery Diners" show on one of those restaurants a while ago. One of the employees was doing things to people's food (and other stuff!! <img src="http://www.traveltalkonline.com/forums/images/graemlins/Shocked.gif" alt="" />) and got caught. I think I would say "not a chance" also!!