I think if we allow cameras in the many public space then in a sense can always be geographically tracked. Also if we assume that dropping things in public mean

I think if we allow cameras in the many public space then in a sense can always be geographically tracked. Also if we assume that dropping things in public means we forfeited any privacy concerns, like our DNA from skin cells, or our fingerprints from cups, in a way we already have the line of privacy drawn very far back.