Unfortunately, why I have never put team colours on my car. To many idiots hanging around outside the grounds.
I remember the Boulevard days, a few times when we walked back from the ground there were lines of opposition supporters cars with there windows smashed in. Spoke to one chap (think it was a Keithley game as I remember) about it and he said nothing had been stolen, they just went down the line of cars and smashed the windows. Its mindless.