I had people run stop signs, than proceed to flip me off for "cutting them off", despite there NOT being a stop sign on my side of the street.

But what ticks me off the most, are people that caboose stop signs... That's when you get to a stop sign, and you let somebody go from the side street. But then the person behind that guy, merely slows down, or maybe stops if lucky, and then blows through the intersection right behind the guy in front of them, oblivious to anyone else in the intersection. Apparently they think they "stopped" so they are good to go, even tho they were last to the intersection. I've seen lines of 3-4 cars caboose each other on an intersection.