Another thing that enrages me is people who think driving slowly is safer for whatever reason.
Getting on the highway? Let's SLOWLY merge at 60% the speed of oncoming traffic.
Changing lanes from stationary traffic into a full speed lane? I won't wait for the lane to clear, I'll just turn signal and move into the lane REAL SLOW because that's safe.
Turning right? Let's slow down to a complete stop and force traffic to a halt so I can turn right.
As a delivery truck driver I can't tell you how many people think that everyone else can just stop on a dime for them and they're being safe because they move over at a snail's Pace.