I had my truck door scratched by a POS station wagon about 3 weeks after my truck was re-painted. The scratch wasn't bad, it buffed out nicely, but to prevent further damage to either doors from *a*holes, I installed a set of nerf bars that stuck out about 6 inches from the bottom of the doors....
Over the course of the next 10 years, all the paint has been literally beaten off the bars from other drivers, but not one more scratch on the truck...
If Mr. Audi had stolen the spot from me, I would have pulled alongside his car and "powered his nose" with a healthy dose of diesel smoke. Asses like them get theirs eventually. Karma can be a bitch sometimes....