I would assume this would be highly illegal for individuals, what sort of hoops did law enforcement need to jump through to get this type of approval? Did FCC need to rubber stamp this?
TLDR: the police do this whenever they want, pretty much.
[0] https://www.theguardian.com/tv-and-radio/2026/aug/03/john-ol...
Almost every RF (legal) communication device consumers own will back off broadcasting if it detects collision or interference.
The fact many governments of the past few decades feel entitled to run intelligence campaigns on their own citizens often points to a degenerative despotic trend.
The best plans simply don't require secrecy, and everyone has fun. =3