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Places like shopping malls use just your devices hardware ids to track your movements.

To me just the fact that these things are on when you ask for them to be off is problematic.

iOS does shuffle the MAC address in order to prevent this, doesn't it?

Yes, on top of this, applications don’t have access to a devices MAC address through CoreBluetooth, so they can’t fingerprint a device.

You can shuffle your mac but not your gsm/3g ids broadcasted in the open as per spec.

I first saw this tech, I think, 9 years ago when I first encountered a "bluetooth spam" device

Yes, except if you connect to their WiFi.

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