While I pretty much land on the 'WOW THIS IS ANAL' camp, I can see Red's point.
This is America. You don't lay your damn hands on another man's car without permission for any reason, whatsoever. Freakin period. That is a violation of an unwritten American code.
Think about it..what if you were waltzing out of Quiktrip and saw some total stranger fiddling around with your damn vehicle, your precious mode of transportation, out of the clear blue sky? I don't care if he IS innocently placing a harmless flyer under my wiper...HE'S FARKING WITH MY DAMN CAR!
An an American, my natural instinct would be to lock my self-control in the john and yell "HEY! WHAT THE HELL ARE YOU DOING?!"