what we do, is pretend we don't care. that will piss them off more then anything.
like when i cut someone off driving, and hes honking at me and flipping me off, and screaming out the window.
i just look at him with a huge fake smile and give one of them little driver "thank you" waves.
that kinda reaction could drive a man insane i tell you. i bet he went home to beat his wife, or bang his head on the wall.