As inferred earlier, the most dreaded words ever heard by me at a show, parking lot or any other...
"I wonder if it's aluminum........"
Soon to be heard by....BANG, BANG, BANG (a knuckle, and hand, and a gun!)
It amazes me how little respect some people have for others property. the comment above about putting your kids in SOMEONE ELSE"S car!?!?!?!?!
Nothing beats opening your garage on a sunny day to do some work, and turning around to find some (other) idiot standing in it

!
But for me, the ultimate pet peeve since I drive mine a lot is somebody wiping acroos the paint to clear off the dust/dirt/bugs to 'see' the paint
