I did a few shows last year, but doubt I will do any more. It's just not worth the headaches. Unfortunately, while most folks are courteous and keep their little ones in check, there are always a few that seem to act as if they were raised by wolves.
Last year, I left my car for a few moments to get something to eat and returned with some guy and his son leaning over the engine bay with their elbows on my fenders. One of them left a slight depression in the aluminum.
As clayfoushee said, eventually you get the cure!!
Bud