[throwawaysea]

There will be both cases of abuse and cases of immense benefit. Your entire comment focuses just on the small likelihood and low incidence of negative outcomes while ignoring the fact that actual criminals will be more likely to be apprehended using this technology. Painting this as a feature to violate civil rights is sheer hyperbole. This solution to identifying and locating suspects is a lot cheaper than the alternative, which is to simply have vastly more police officers on patrol.