6 Year old on terrorist 'No Fly' watchlist

I'm not joking, according to this article on digitaljournal.com the TSA (Transport Security Administration) had placed a 6 year old on their terrorist watchlist, making her unable to fly with her family to go on their holiday. The article only suggests that she was placed on the list because she didn't have a frequent flyer number (which seems a bit strange to require considering she is only 6).