and paint his car a different colour using a sharp stick...!
Seriously PL should start a comment of the day...
classic hahahaha!
One day in Dubline we were at traffic lights waiting for the lights to change and a bunch of skangers pulled up beside us, the driver one of them lowered his window and spit a big filthy green one onto out window, we were furious but sure what can you do, the cops are idiots or are too busy trying to catch proper criminal (ie write parking tickets) and if you chase them they could have knifes or even guns...but y'know that Dublin where they have a special breed of scumbag....
sorry to hear this is happening to you, i think young lads especially in cities in uk and ireland have had it too easy from their folks, no manners have been taught to them, you wouldn't really find that kind of bolloxology outside the cities.
but try and get the reg plate number next time, but dont ever chase them, ya never know what they might have in their pockets