My favorite car yelling story:
A few years ago, I lived in a development near a new car dealer. My street was pretty curvy, had a "S" curve right in the middle, in fact. Well, the moron salesmen used to cut through my street, and drive really fast to get the full effect of the road curves.
I can only guess it made them feel like they were running a European race course. This would be fine except for the kids, pets, and old people they terrorized by this behavior.
I had a lot of free time, so I often spent it outside yelling at the morons to slow down. Believe me, on a Saturday, it was as busy as most main streets with these idiots racing down through my development. My neighbors suggested I should do something besides yell at the cars.
The next Saturday, a car went zipping by, and I yelled. He flipped me the bird.
This did not sit well with me at all.
I then got in my truck, and drove across the highway to pay a visit to the showroom.
As I walked in I spotted the a-hole. He was sitting with his equally stupid co-workers and laughing. I asked for a manager. They continued laughing. When the manager came over, I explained the situation. I told him I wasn't sure which jerk it was, but if I saw another one of his new Hondas on my street driving fast, I would mark the car for him with a large rock so we would be able to know which salesjerk it was. He apologized, and said it wasn't going to happen again.
A few weeks later, a neighbor came by and said to me, "Not sure what you did, but I haven't seen a Honda around here for a few weeks."