One of the best applications of security policy could be seen at Houston airport recently the afternoon before the hurricane struck.
Aircraft were being told to depart by 4.00 pm because "that's when the TSA security will stop". And if you weren't through security by then you would be stuck there. So the government, the representative of the people, is quite happy to tell people that they would rather leave them to the ravages of a terrifying storm than allow them to leave the area without checking their bags for nail scissors.