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There is a difference between capturing data passively (which this is), and actively trying to extract it. That's the difference between a paparazzi and Google Streetview. Of course the average person has no idea what they are broadcasting.

The reality is that modern gadgets always leek unique data that could be identifiable; and trying to lock down every path is impossible.

Perhaps every app, browser page or network connection should get its own GUID that it always included, un-encrypted in every request by default. Then give users the ability to change it easily on a per app basis. Make laws that require companies to only collect the GUID and no other passively collected information without explicit permission.