I've seen a few times in videos where the camera was in fact a useful tool in showing true fault and actions. Where I live though, it's small town enough and I only occasionally go into the city, that having one for myself just doesn't seem worth while. I don't know what all is involved with maintenance or any routine jobs it would create for use either, but I can see where that inevitable one time that it may be of use in stopping someone else from getting away with some egregious act. The way more and more drivers are stupidly distracted, driving angry at the world, only concerned about themselves and could not care less about anyone else, think they are above everyone else, or the law doesn't apply to them, or just plain dumb, is mind boggling. I see this kind of stuff almost daily, and I may only see 20-30 cars at a time most days. The times I go into the city or go out onto the highway, it is amplified greatly. Maybe I will look into one...