I had a similar idea, and I suspect that address randomization isn't as big a problem as you might suspect, since many people have a paired device (i.e. headpho

I had a similar idea, and I suspect that address randomization isn't as big a problem as you might suspect, since many people have a paired device (i.e. headphones), and that pairing often uses classic Bluetooth, so it must have a fixed address. The burglar's car is also likely to broadcast unrandomized bluetooth if it's in the area, also. But the real trouble with this system is that the police aren't going to do anything with this data unless there's a murder. Even if a bluetooth device were stolen and you could locate it, the police will not likely help you recover anything. And this assumes that they even understand what this pissed-off nerd is on about. Amazon, however, could build a bluetooth sniffer or IMSI catcher into its devices and sell the resulting data to law enforcement, who could then avoid the time and expense of getting a warrant for location data. Assuming that the police care at all about property crime, this would achieve the goal.