I think it will take more than legislate alone but I think it would be a step in the right direction. I just really want some transparency. Recording where everyone is going and having a mass database of it and then PRISM collecting all information about who you call and your online activities is a very worrying idea and it is 70% implemented.
All it will do is make life difficult for autonomous vehicle startups, while the incumbent drone manufacturers will continue to design, produce, and sell drones to the FBI, for a massively lucrative markup.
Edit: just saw your edit. Technology essentially prevents physical anonymity, and if it doesn't today, it will within the next decade for sure.