Your life is more important than....
I like the camera idea!! Put a disposable on a cord around your neck. Doesn't even have to have film in it, the flash should be enough.
I've been cut off, things thrown at me, been shot at (just BBs and pellets so far, whew) more times than I even want to count! Cops here are worse than useless, they seem to always take the side of the motorist or just can't be bothered. Bet if I tried any "revenging" though, they'd be right there to write me up!
Remember, we do this for FUN!!