A while back, there was apparently some sort of protest in DC where a whole bunch of people were wearing trenchcoats, nose-and-mustache disguises and signs that said SPY, and were wandering around looking at each other through binoculars and taking pictures of each other.
I'm just picturing a swarm of people in blank uniforms tailored exactly like TSA ones milling around an airport security checkpoint.
It'd be sort of like that scene in the remake of "The Thomas Crowne Affair" with all the identical businessmen in bowler hats.