Well, I don’t want my van pool office called. The van has the van number and office phone number on the side, front and back. I keep both hands on the wheel.
You won’t see me giving anyone the “one finger salute” / “you are the #1 driver” gesture.
I try not to get exasperated myself. It never fails that when I do, and then get closer to the offending driver, I see a handicapped emblem on the license plate or hanging from the mirror. That always makes me feel sheepish.