"Back in September 2003, the American Legislative Exchange Council (ALEC) released a piece of model legislation it called the Animal and Ecological Terrorism Act. Like so many bills drafted by the free-market think tank, AETA was handed over, ready made, to legislators with the idea that it could be introduced in statehouses across the country with minimal modification. Under the measure, it would become a felony (if damages exceed $500) to enter "an animal or research facility to take pictures by photograph, video camera, or other means," and, in a flush of Patriot Act-era overreaching, those convicted of making such recordings would also be placed on a permanent "terrorist registry."

Frustrated by unauthorized documentaries of slaughterhouse abuses, the agriculture industry hired corporate lobbyists to hire Congressmen to insert laws that would ban PETA activists from using the US air transportation system.

These have been implemented in a number of states recently, although I'm not sure if any of them included the watchlist provision in the final draft.

* http://www.motherjones.com/environment/2013/06/ag-gag-laws-m...