I could see legitimate risk with RFID tags. One of the tools sigint uses is simply the volume of transmissions going from one point to another. You can wrap tag

I could see legitimate risk with RFID tags. One of the tools sigint uses is simply the volume of transmissions going from one point to another. You can wrap tagged documents in RF blocking covers but eventually you'll have to unwrap them to view. You might even be able to infer the kinds of documents being moved if you track routes. White House to DoE etc. Sounds far-fetched but there have been some pretty wild methods lately about timing screen flashes to determine hash creation and stuff like that. Nothing is too far-fetched to intelligence gathering.