From a law enforcement point of view. How do you face your accuser when your accuser is a facial recognition system that thought you looked like someone else. So the local municipalities will be passing out fines to people the camera see's jay walking, spitting on the sidewalk, dropping a cigerett butt,... Sounds like stoplight cameras. More revenue with less service. Marketers would use it like they use email now. The system sees you visiting the store and they will blast you with spam inviting you back and providing cupons. You pick up a widgit that caught your eye to get a better look and put it down. The marketer spam you with information about the widgit and give you a coupon. They will also sell your information to the maker of the widgit. The maker will then blast you with more spam telling you how great the widgit is and also provide you a coupon. No, our country has provin it does not have the ability to use the technology responsably.