What if a private organization set up cameras observing everyone walking every street and avenue, and stored facial eigenvectors of all the people walking there.
It could then set up shop as a service, and given a picture of someone's face, tell you when and where they went anywhere on foot in NYC.
It could then set up shop as a service, and given a picture of someone's face, tell you when and where they went anywhere on foot in NYC.
It's all public, right?