Here is in article in the local paper. Sorry, although it's free you have to register to read it. Here's the first couple of paragraphs.

SPARTANBURG, S.C. -- It wasn't what an off-duty state trooper and his wife expected to see when they glanced at the DVD screens in the backseat of the sport utility vehicle in front of their car.

But there it was: hardcore pornography playing on two screens as the driver cruised down Main Street the day after Christmas.

There was no one in the car besides the driver, and he claims that he was watching the movie himself and didn't realize you could see it from outside the car. It was playing on two screens in the back.

The article mentions similar cases in other states.

My first thought is, how are you going to safely drive a car and watch any movie at the same time?

But again, this goes back to community standards and who gets to say what they are. Also from the article:

In 2004, the Tennessee General Assembly enacted a law that prohibits such display and provides a fine of as much as $50 for doing so.

Memphis police have cited at least one person for violating the law, but a Shelby County Sheriff spokesman reports that the law probably has not been used in his office's patrol areas.

R has seen this himself in Memphis. I haven't (yet).

I have a real problem with the driver being able to watch a video inside his vehicle while he is sharing the road with me. I don't want to have a wreck because somebody was not paying attention.

I guess that if people in the back seat have got to see a porn video, that's not my business AS LONG AS it is not visible outside the vehicle. It's funny how the right to have porn used to be nailed to the right to privacy, and now that the regulation of it has pretty much been given up on (rightly or wrongly) some proponents seem determined to make other people look, or trick them into looking. I've gotten spam about "lower your interest rates" and when I clicked on the link (only did it once) it took me straight to a porn site. My daughter had to abandon her hotmail account when she was about 14, mostly due to pornographic spam, and once again, the subject line and message text were always very innocuous. (Hotmail does a better job now of screening that stuff.) Surely people who want to view that stuff know how to find it. But that's not good enough, apparently. It's not about privacy any more. They have to SHARE. It's an interesting commentary on that kind of psychology.