In-Car TV

The other night, I pulled up to a light next to a Honda Odyssey minivan which had a small TV screen flipped down from the headliner.

On it, quite easily visible to anyone in adjacent lanes, was some sort of porn.

I really don't understand... do people really need to be plugged into TV all the time? Isn't driving engaging enough? And even if they must watch TV at all times, can't the keep their porn at home, where the rest of us don't have to look at it?