What about those who drive real slow so you have to tap your horn to make them move faster.

Some of them go even slower when you tap your horn and ignore you. Then after a few more taps, they just stop dead in front of you and put on their hazard lights with no regards for the other vehicles behind you.

When you finally move your vehicle backwards and forwards to try and get out of the pinch and try to get ahead of the moron, the idiot will zoom forward and not let you merge and will engage you in some kind of race.

Sometimes it takes all my will power not to stoop to their level and engage them.

Then there at the slow moving taxi cabs with no other vehicles around them but for some reason, as you will pass them, they will go to your lane and you'll have to frantically brake in order not to hit them!