I escorted some cellular tower workers at one of our sites where we allow "vendor/co-locates", think they were AT&T. The guy was telling me how people approach them at facilites, wearing foil hats and complaining about the RF their equipment emits. He wants to tell them to F off but can't because of the logo on his door, so he tells them "Homeland Security" with a crazed look in his eyes, I saw it, I believe that probably worked for him in past lol!