A potentially interesting aside is that Do Not Track was removed from Safari some time ago. Why? Because nobody respected it, and since it was a user setting t

A potentially interesting aside is that Do Not Track was removed from Safari some time ago. Why? Because nobody respected it, and since it was a user setting that needed to be explicitly enabled, it proved to be a useful additional dimension for browser fingerprinting. So the irony is that, "do not track" ended up being used... to track.