I know this is written to sound scary, but it's been like this since the invention of the radio/telegraph (late 1800s?). You're getting blasted by rf almost continuously, unless you live in a bunker.
"I know this sounds scary, but don't worry - all this spying won't give you cancer!"
This is written to sound scary/capatalize on a relatively underdiscussed snooping mechanism.
But it isn't at all like straight UHF/VHF radio intereference spectra analysis or whatever we want to call it.
Wifi, Cell network bands, bluetooth and hard fiber lines are all far more exploitable than "regular" RF . A police squad car equipped with the RF package (which convienetly comes from defense contractors) can grid out your home and hotspot people, devices, etc. This is only possible due to exploits/abusing these standards and cooperation w/ device/tech vendors.
Is this a problem? Eh, not for me where I live. Is it illegal? I am not versed enough to know how procedural/ y the books this is. But it is odd that a passing police vehicle potentially has unmarshalled/warrentless seach running 24/7.