In addition to ones listed the above:
- Drivers who let their passengers put their feet up on the dash. How the hell are they going to check their right side view mirror before they make a lane change?
- Drivers who let their pets sit on their lap while driving. An innocent person was killed last year because another driver's dog caused them to cross into the opposite lane.
- Drivers who have "Baby on Board" signs on their vehicles and expect everyone else to look out for them because they're too distracted to look out for themselves or anyone else.
- Drivers who don't unplug their extension cords from the block heater and wind the cord around the mirror. I've seen the cords unwind on the freeway and fly around whacking neighboring vehicles.
- People who have their entire stuffed animal collection on the rear dash.
- Drivers who tail you through a playground or school zone trying to get you to go faster.
- Drivers who tag along the car ahead without stopping at a 4 way stop.
- People who park tight against your driver side so that they can have ample room to get out on their driver's side.
- People who empty their ashtray on the road or in parking lots.
- Drivers who swerve one way in order to turn the other way.
- Drivers who stop at the end of a merge lane and expect flowing traffic to come to a complete stop to let them in.
- Drivers who expect you to stop in the middle of the intersection to let them in your lane because they're stuck behind a stopped bus on the other side of the intersection.
I could go on all day...
