There's a guy on twitter I follow, he often goes up to the window of the driver that was honking at him, when they're stuck in the line of traffic that inevitably stops the car, usually about 10 meters down the road. This is generally how the discussion goes:
"Why were you hooting at me?"
"Because you were taking up the whole road, and delaying me!"
"Why don't you hoot at that guy right there? (Points to the car in front of them in the queue of cars.) They're holding you up a lot more, and they're taking up the whole road! Go on, hoot at them! Why aren't you hooting at them?"
That's usually when the driver rolls up the window,