Maybe they can detect, maybe they can't. My point has reached the point where you need a warrant and probable cause to"search" a citizen for those type of intrusive readings. A bit different than reading facial expressions and body language...
Many people say, well if you are standing outside and can be seen by a person or a drone from any location with any technology then you are in plain view and have zero reasonable expectation of privacy so its all on you. It is the classic...
Yes, the FAA imposes a TFR which bans the news media from news gathering by drone but does not ban "special" government drones flying with special authorization. I used to think the FAA would not impose a TFR banning news media or anyone else...