I have always had the opinion you lose privacy when you leave your house
Privacy is not black and white.
There is a world of difference between someone seeing you for a moment as they pass you in the street and forgetting you a moment later, and automated systems that permanently record everything, analyse it, correlate it with other data sets, make it searchable, and ultimately make automated decisions or provide information that will be used by others to make judgements about the affected individuals, all without the knowledge or consent of those individuals and therefore without any sort of reciprocity.
The idea that you have no reasonable expectation of privacy in a public place dates from a time when you could also expect to pass through town in relative anonymity, go about your business without anyone but your neighbours and acquaintances being any the wiser, and would probably change those neighbours and acquaintances from time to time anyway so the only people who really knew much about you would be your chosen long-time friends and colleagues. I think it's safe to say that that boat sailed a while ago, and maybe what privacy means and how much of it we should expect or protect aren't the same in the 21st century.
Privacy is not black and white.
There is a world of difference between someone seeing you for a moment as they pass you in the street and forgetting you a moment later, and automated systems that permanently record everything, analyse it, correlate it with other data sets, make it searchable, and ultimately make automated decisions or provide information that will be used by others to make judgements about the affected individuals, all without the knowledge or consent of those individuals and therefore without any sort of reciprocity.
The idea that you have no reasonable expectation of privacy in a public place dates from a time when you could also expect to pass through town in relative anonymity, go about your business without anyone but your neighbours and acquaintances being any the wiser, and would probably change those neighbours and acquaintances from time to time anyway so the only people who really knew much about you would be your chosen long-time friends and colleagues. I think it's safe to say that that boat sailed a while ago, and maybe what privacy means and how much of it we should expect or protect aren't the same in the 21st century.