Do you beep your horn when you're in stuck traffic?
If so, why? What do you think is going to happen?
Edit: by 'stuck traffic', I mean in a jam that no one in your vicinity can do anything about. I don't mean just having some moron in front of you who apparently doesn't know what green signifies - or has forgotten where they are because they're busy making sure the attention the world owes them is still flowing from the little screen that dominates their life.