"Also, almost all cameras don't advertise Bluetooth" Many new cameras do. My Nikon surely does, and it keeps it on for quite some time after turning the device

"Also, almost all cameras don't advertise Bluetooth" Many new cameras do. My Nikon surely does, and it keeps it on for quite some time after turning the device "off". Cameras use it to to set up adhoc wifi connections, and sometimes even for data transmission of preview images. I can't say whether laptops keep broadcasting or not (though I'd certainly make no assumptions given that BLE is made to allow virtually limitless use), however laptops are often stowed with a wireless mouse which gives the game up. "Also, Tile trackers are mostly kept in things that people want to keep with them, one of their functionalities is precisely to warn the user when they're left behind." The example they gave is a trailhead. There's a lot of shit you don't want to bring on a hike with you that you stow in your car, out of sight and hidden away for exactly the sort of discussion we're having. Is it just a theory and suspicion? Maybe. But logically it makes a lot of sense, even if just "fear-mongering". It does rationally seem like something to contemplate, which is supposed to be the sort of subject HN was made for. Out of curiosity I tried out a BLE scanner, finding 14 devices in my immediate proximity. Something I'd never really thought of before.