I have to admit, I've thought about putting a camera on my car ever since I heard the case about the rally driver who had a claim against him for rear ending someone on a motorway after returning from an event.
Turns out he was the camera car that day and there was still tape rolling in it, and the guy he hit had pulled across with a few feet to spare, then jammed on the brakes.
The only person reveiwing the film would be me though, unless I needed it to prove something to my insurance (who are a bit more flexible about digital photography than the courts are)
It is fairly trivial to do. My
Car PC is about 95% complete, just needs a failed fan fixing and some in situ testing, and the software setting up. Plugging in a USB webcam and capturing images would not be too much more work. Many people already use similar systems to have a reversing camera on their car (though obviously without the recording aspect)
The possibilities for abuse are endless though if the system becomes legally admissible. Think of the most obnoxious busybody neighbour you have ever had. The one who calls out the police if your washing machine doesn't finish until 10:05PM. The one who reports peoples project cars as abandoned despite being on their driveway. Now imaging that person having nothing better to do than following you around for days on end waiting to catch you slightly clipping the give-way line when turning right into a minor road so that he can report you. No thanks.
My camera? I might put the videos of the more comical bits of stupidity up on a website for other people to laugh at, probably with blurred out number plates.