I remember once when I was in the Zed, a group of youths threw a glass bottle out of the window which smashed against a lamppost and rained glass into the car (roof was down). I saw red, followed them through town to get enough info and then call the police. Pulled over to make the call, and they also pulled over and four guys got out and came over to the car whilst I frantically tried to raise the roof to avoid a pasting.
We all spoke calmly about it in the end and went our separate ways, but really I got lucky. I've learnt my lesson now, and I'll simply get briefly angry then move on, life's too short to deal with nutters.