The CIA, by Law, has never been allowed to operate within the United States.
Could be the FBI or the SS (ironic initials.)
Of course, using words that are known to raise interest by the national security cowboys would be bad enough. Using all such known words certainly waves a red flag and forces answers to to the obvious question and raises another : what were those words?
I can't help wondering if Amish and Norwegian Swedes are among the new red flags.
I bet it was agents from Warehouse 13 looking for some liberal artifact . . .