Some quantitative differences are so big that they are qualitative. There is a qualitative difference between "You can walk around and people-watch with your o

Some quantitative differences are so big that they are qualitative. There is a qualitative difference between "You can walk around and people-watch with your own two eyes" and "You can collect data on thousands of people from all across any major city with thousands of machine eyes" The law is simply out of date. There should be an expectation of privacy from surveillance.