I have a friend who regularly posts videos of bad things he sees while driving, but in my opinion it's always a little overblown. I recently watched a drunk pickup driver almost slam into a median as he swerved about; it would be nice to have the camera to help somebody out in the aftermath of bad things, but it really does nothing to stop bad things from happening.
I don't know, it sometimes feels like a 'fear' thing, as if we didn't have enough fear in our lives. What if? What if? I've seen my friend's videos and sometimes felt a short wave of panic sweep through me as I wonder if maybe I should have one, too. I really don't want to live my life in fear, but I can definitely see the value, too. Currently, I've just been too lazy, but I'm sure it's worth the $70 or so.