- people that drive way under the speed limit
- people waiting to turn out in the road that inch forward a little bit more as you are driving by them.
People in the left turn lane who stop well past the line. You can't turn until you get a green light anyway, so why do you need your back wheels past the stop line. It's not like the people who can turn right on a red light who scoot past the stop line to get a better view to the left.