> Also PSA, if you use Bluetooth with your car, your city transport department is tracking you. Best of luck opting out of that or even finding who to contact.
Can you say more about this? I've never heard of it.
Houston does it. They have bluetooth trackers on all the highways. They use it for determining congestion based on how often you can ping the same address. Keeps pinging? Gridlock. Pings once, traffic moving.
They put powerful bluetooth sensors on poles or in roadside cabinets. They're pretty cheap to deploy so have become widely used.
Pretty much if you have two bluetooth devices talking to each other, you can be tracked by your bluetooth mac address. (Same as wifi networks and sniffing with wireshark etc)
Or if you have a device pinging with a non-random mac (ie your car).
If you've got an iphone and it's not actively being used, you get a random mac, no problems.