whiskeywalrus if you have bluetooth on, that is a permanent non-changing identifier. If it is linked to your device once using anything definitely linked to your identity, then any blue tooth beacon it hits will track you. It's not an OS issue, it's the nature of the technology. Just don't use bluetooth or only use FOSS and don't connect with any devices linked to your identity (ie bluetooth speaker you registered waranty for, bluetooth headset purchased online if really paranoid).