Just apply to erect a monument with a Bible verse or two on it. They could not possibly object to a real Bible verse or two.
"The things that happen here at NSA really have national and world ramifications."
Like making the rest of the world distrust and hate the USA.
The Canadian Government tried this angle and it blew up in their faces big time. Really really big time.
Protecting Children from Internet Predators Act
The civil disobedience/protest was so large the mail servers of parliament were knocked off line.