I haven't gotten one, but my Dad and my Sister have. They take a pretty good picture of you, so you can't say it wasn't you driving when you're clearly in the picture.
What's scary, is my Dad said a few people DUCKED through the red light, and they got away with the ticket because you couldn't see them in the photo nor the video.
So basically, you're encouraging people to run through a red light with their head down and not on the road...