That is a discussion that can be had between the offender and the police officer, also depending what you are driving (ie a motorcycle) often traffic lights may not detect you and you can be sitting there forever.

Put it this way would you feel comfortable having your phone just passively watching you and anytime you break any law that is on the books it calls the cops on you? If you can see that as over reaching you can understand why others don't want automated enforcement done to them.