A guy I used to work with said he once threw what was the equivalent of a big gulp through another cars open window once. His lane was ending in a concrete barrier and the car next to him would not let him over. Speeding up or slowing down so he was stuck in the lane.
I will admit that I've done that to people before. When there is a long line of cars in the right lane and there are signs that the left lane ends I will not let anyone over that cruises along in the empty left lane to get ahead in the line. That BS is what causes a lot of my road rage.