When riding a motorcycle and you approach an intersection where you have right-of-way, and a doofus rolls through the stop sign without even looking at traffic coming from your direction. Don't they know that a collision for the motorcyclist will end very badly? It's not because I'm invisible, I ride with hi-viz helmet and jacket, these jerks are just too lazy to look before entering an intersection. I actually spoke with an idiot that did that, and he said "I saw you, I was going to stop"--couldn't tell by the dumbass look on his face.