> If someone doesn't want to be captured, too bad, they shouldn't be throwing photons at you (read: if they want privacy, they shouldn't be in a public location).

That is true when it comes to merely being seen, but not being recorded. Being in a public location naturally implies consent to be seen, but it does not imply consent to be recorded artificially. (This includes any augmentations to human abilities from future technology, as someone mentioned this in a later comment)