Well it has happened my parents and a friend in TN got speeding camera tickets. They both wear portable units on the side of John Sevier Highway. I looked it up and found nothing in TN about them using them. They got mailed to their homes with a pic of them driving. Just something to keep a heads up for people who travel up there. Something else I think is weird is the girl I knew that got the ticket has a passport 9500 and it never went off, and that thing never misses.