There is a reasonable expectation to not be face-tracked in public just like there is a reasonable expectation for everyone not to be followed 24/7 by undercove

There is a reasonable expectation to not be face-tracked in public just like there is a reasonable expectation for everyone not to be followed 24/7 by undercover officers. In the past law enforcement did have to be told not to do the latter, since it's a total waste of resources, but now the former is cheap enough to actually happen and administrators want the new tech on their resumes. Current precedent is out of date. Free society depends on the people's ability to bend and break unjust laws. It cannot survive the ossification of mass surveillance.