Unfortunately it is that 1% of inconsiderate bozos that create 99% of the problems at the shows. Maybe since I've gotten older and grown curmudgeonly that I no longer hold my tongue.
The worst was the know-it-all who was leaning on and into a showcar engine compartment blathering on about this and that quite loudly. I informed him (politely mind you) that show cars are not to be touched. He responded very indignantly that he's been around the circuit (or was it circus) for over 30 years and knows "all about the rules" and that I don't need to tell him.
I told him if that were truly the case then he would know to "NOT TOUCH THE CARS" (capitals used to emphisize a louder voice).
He left in a huff....
It wasn't my car but I know the owner would not want it inasmuch as I wouldn't want it done to my car.
At Warwick my wife witnessed someone peering into the drivers side window and thus left a nice big nasty smudge on it. She was able to tell the owner before it was judged.