>Everyone leaves telemetry breadcrumbs everywhere. Almost everyone radiates a ton of different kinds of data, RF, optical, etc fingerprints that are incidentall

>Everyone leaves telemetry breadcrumbs everywhere. Almost everyone radiates a ton of different kinds of data, RF, optical, etc fingerprints that are incidentally picked up everywhere they go. What does this mean in concrete terms? "optical, etc fingerprints" just sounds like a fancy way of saying "facial recognition". I'm also not too sure what "RF" translates to. Is it just wifi/bluetooth/celluar sniffers?