I HATE PEOPLE WHO DON'T KNOW HOW TO USE A FOUR-WAY STOP!
So I'm driving along, come to the ramp with a four-way at the bottom. The dude in front of me slows down from 70 to 25 as soon as he hits the ramp, and brakes halfway down the ramp.
He coasts into the stop sign while three cars on the cross street make their stops and go through the intersection. Then he stops at the sign, waits and waits (he had time to go, the fool) until the little old Asian lady in the VW pulls up on the cross street and stops, then leisurely pulls out.
So now I'm stuck behind granny, going 15 miles an hour to the next intersection, where she stops to turn left. A task she can't begin until there are no cars in sight as far as you can see in any direction.
I swear, I need a Humvee - not a Hummer, the real thing, armor and all - with a blade on the front to push people out of the way.