This should make your hair stand up! Your WiFi router and all your smart appliances (including your smart meter) create a dense web of EMF radiation in your home that can be used to see everything and anyone. A scanner used by someone outside your home can see through walls, spot people inside, see all your stuff, etc. Technocrats invent without conscience, ethics, or morality.
Note that the team at Carnegie Mellon University and the University of Waterloo “built the device using a store-bought drone and $20 of easily purchased hardware.” ⁃ TN Editor

When police suspected Danny Kyllo, an Oregon man, of growing cannabis in his home they drove to his house with a thermal imaging device to scan it. They found hot pockets in the house, which were used to obtain a search warrant and subsequently bust Kyllo.

Fortunately, a 5-4 Supreme Court decision ruled the scan an unlawful search under the Fourth Amendment, requiring a warrant the police did not obtain. Score one for privacy, but the government is about to have a far more controversial and dangerous tool at its disposal to monitor what’s going on inside your home.

Unlike a thermal imager, this device is already in your home – and you put it there.