I got one of these about a month ago. I started to download the trailer for Charlie Wilson's war, then realized what I was downloading was NOT the trailer. I literally had the download running no more than 3-4 minutes or so. The next day or so, I had a letter from Comcast.
<shrugs> I haven't heard anything else, and since I stopped it so quickly, I was not too concerned.
Besides, I'm not about to download a movie that someone filmed with a camera in a theater, anyway.