Comment by AstroNutt
I've thought that too... especially Bluetooth. I know it's possible with Wi-Fi signal strength.
Is it a coincidence most smartphone manufacturers were suddenly all on board with removing the 3.5mm jack and forced Bluetooth? A mesh network of sorts like Amazon is doing with Ring. I even sometimes forget to save my battery and turn Bluetooth off when I'm not using my earbuds. It's probably a false sense of security having it disabled because I'm sure it's doing something in the background anyways. I can't say for sure though. Kind of like years ago with Google getting caught with the whole location data thing. I'm sure the average Joe doesn't care if Bluetooth is enabled 24/7.
I try and not be on the tin foil bandwagon, but every once and a while I come across things that make you go hmmm...
I doubt BT is the right way to locate a device, it's far better for being located (FindMy-style).
Wi-Fi is better for positioning since BSSIDs are (mostly) static and APs don't move around.
On top of that, BLE usually uses random addresses - so it won't be of much help knowing that you were around CC:B9:AF:E8:AE at 10:05 AM - since that address is likely random.