Not me but...
a bloke who used to do body repairs for a company I worked for many, many years ago.

One evening he'd narrowly avoided hitting a car that had been parked up and suddenly pulled out without any indication. Obviously he let it be known that he didn't think a great deal of the drivers ability and this upset the four young blokes in it and they started to follow him. He'd tried losing them without success and ended up driving down a dead end track, obviously thinking he was in for a kicking.

He decided he wasn't going to make it easy for them and started looking around the car for something suitable to protect himself with but this was his other halfs car so no work tools.

When he stopped, the other car pulled up alongside and as they did so, he raised a toy gun of his Son's up to the window. Understandably they reversed pretty sharp-ish and disappeared.

Obviously not a recommended course of action, certainly not these days (and this was in Manchester) but hopefully that's 4 people who won't try intimidating other drivers again.
(RTFM May your god go with you, Tue 27 Apr 2010, 12:37, Reply)