sorry to hear that you had to go through that bud. Down here in vic, there have been a few cases like that - seems like its becoming more and more like the U.S. Do we really need to arm ourselves with guns, knives, wrenches and all that crap?
Anyway - good thing that you werent hurt or anything. But yeah, next time, just drive to the local police station and park in front. Wait for the guy to drive off - but get a good look at the plates - and put in a complaint. I guess if many people put in a complaint, then they cops would have to do something about it.