Long story short, last year our son installed a video camera in one of our cars.
I actually kind of like it because if something like this does happen (auto accident), the camera is basic proof that either you did nothing wrong and perhaps you did. I figure the day I decide to take it out is the day someone gets in front of me, and backs up into me claiming that I hit them LOL
Funny enough, last month I was riding with my son's friend on a short drive from the house when he totaled his brand new car (just him and me in the car). He had a camera in his car. All I will say is he is blessed that I know what it was like to be 21 and stupid, and I was pretty easy on his mistake even though I got a pretty good scar out of the deal, added it was so new (3 days old) that his memory card hadn't come in yet for him to put in his new video camera for his car.