One of the development team here - if anybody tries it and has feedback it would be very welcome!
Have you talked to the law enforcement agencies? Will they actually use the footage?
Incidentally, I was involved in a heated discussion with someone the other week about her poor parking. Turns out she sent webcam footage to the police and I received a letter saying I had been reported for a public order offence but there was not sufficient evidence to act further.
Raising ones voice isn't yet an offence I am pleased to report.
That's because "bad driving" is not a crime. You probably got that person charged with fleeing the scene of an accident or some kind of road rage charge. Depends on what happened.