I also cannot stand "courtesy drivers". They need to be dragged out and shot. If you don't know, a "courtesy driver" does genius stunts like waving people out into traffic. Let's say on a two lane road (two lanes on each side of the median), and they are in the rightmost lane, they will actually stop to let someone into traffic(creating a traffic backup) , and vigorously wave them on, straight into the left lane, where they will be struck by a car. I've always fantasized about choking a courtesy driver to death.
Second this. A guy I knew in the 7th grade got killed (but not right away - he lived for a week or two) crossing a street on foot when one driver stopped for him, and one didn't.
RIP Peter Emborsky