I have never seriously considered defacing, vandalizing or even touching other people’s cars. Someone might be an asshole but could one really say that as a fact just looking at their car? Even if its poorly parked or whatever, one never knows what that person is like, what kind of day they’re having, etc.
But lets say one knows for sure the car owner is an asshole, i still would not touch their car. I do not do things that i would not done to me, and i do not want anyone to mess with my car.