One of my favourite tricks when someone acts like a dick is to insult them and then drive away like a coward. It INFURIATES them.
For example, a few months ago a fat guy in a 4x4 was coming down the road towards me. There were cars parked on both sides of the road so only one car could go at a time. I got there before him and drove through.
For some reason he thought he had right of way and started swearing at me and shaking his fist. I waited until I was next to him and then flipped the bird at him. He lost his mind and started getting out of his car but I was driving away. He then tried turning around but he couldn't cos of traffic behind him. I chuckled as I looked at him in the rear view mirror.