Yeah, drivers do stupid things.
As a pedestrian, what annoys me: I'm standing at a corner waiting to cross the street, but standing on the sidewalk, not on the crosswalk. And I'm waiting for a car to pass before I cross. The driver slows and stops, to let me cross. But it would be faster if he/she just kept driving.
And then sometimes there is traffic in another lane and even tho he stopped, I still couldn't cross.
Just keep driving if there is no one actually in the crosswalk, that is my rule.
Similar problem is in a 4-way stop sign. Other car was there first, so I wait for him to go. (He may be waving me on, but can't really see that usually). So we have two cars both stopped waiting for the other to go.
Near me there is a strange 4-way stop where some cars have to do a Z type of turn to continue. This gets funny sometimes.