Anything a normal person would assume is private should be treated that way. License plates? That's why they are for, you register your car with DMV or similar

Anything a normal person would assume is private should be treated that way. License plates? That's why they are for, you register your car with DMV or similar institution in your country for the sole purpose of matching you with the car. So keeping database of all license plates that match drivers, perfectly ok, but scanning automatically license plates and building map of your daily routes, that is going too far. Where I frequent is my private business. Public airwaves? Yes, the keyword is "public", assuming the communication is not encrypted. If it is encrypted then it means it should be private. Criminals can use encryption? Doesn't matter, it is still private. If we allow to go that route, next thing you know we will have implants in our heads transmitting what we are thinking. “Those who surrender freedom for security will not have, nor do they deserve, either one.” -- Benjamin Franklin