Looks like I'm going to have to get a Go Pro or something of that ilk!
I've had a few run ins with idiots in cars, one woman in a 4x4 almost creamed me whilst going round a round a bout ( she came from the road to me left in front of me at great speed, I managed to break and swerve) I go a "wheeeeee!" As she passed 1ft from my face thru the open window, and a "you wanna be more careful!" I got the last laugh as I caught her up in the morning school run traffic, took a picture of her number plate and straightened her on the Highway Code, she has avoided this route ever since thankfully.
I've been cycling on roads for about 34 years, and only been knocked off once, but I've seen countless idiots, on an almost daily basis, if getting a go pro and sending the evidence to the police can help correct a few attitudes, as well as the more obvious uses, then I'll be looking to pick something up soon