I believe there is a buffer zone of private posted land surrounding the plant. The hunters must be unfamiliar with the area.
http://www.amarillo.com/stories/011510/web_pantexupdate.shtml
Two off duty employees were hunting geese TWO MILES SOUTH OF THE PLANT.
With all that is out in that area, just how the hell would the plant know if anyone was hunting TWO MILES away? And if so, how can that be construed to be a security breach? This whole thing reeks.
Two miles of buffer? I guess they are they worried about rockets or artillery.