Comment Re:Flock is building 1984 (Score 2) 121
Being in public does leave you with no particular defensible expectations of not being observed, and possibly even remembered for a time, by assorted passers by; and typically also permits more direct tailing of people for observation purposes(subject to some, often slightly vague, threshold at which having PIs or paparazzi hunting someone remains a problem even in public; as we saw here where the police took the notion seriously enough to show up but not to do anything in particular).
What it has historically never meant, for technical reasons, was pervasive coverage and longterm retention. Which is certainly increasingly feasible with only moderate levels of investment; but is absolutely a novel development for what 'public' and 'no expectation of privacy' meant.
It's like defending the installation of a massive network of sprinklers because "you have no expectation of staying dry when you go outside; haven't you heard of rain?" Sure, nobody the weather to be sunny all the time, any more than they expect everyone to avert their eyes in public; but they would correctly consider the installation of irrigation equipment on every lamppost to be an intrusion on their ability to stay dry despite the fact that the sky has never extended them a constitutionally protected right to no rain.