As a biker, I can laugh at that - I too "buzz" persons acting stupidly whilst having earphones drowning out the the traffic noises - or potential danger as it is properly called.
Better are the fag smokers (and I am one) who lob discarded fag butts out there window. With you visor down, it is merely irritating, but with it up, as happens depending on the weather, then it is downright dangerous. A swift rap on the side window with a kevlar clad glove also elicits the "jumping out of the skin" response - and normally a head/roof impact.
:-)