The thought experiment is predicated on just application of the policy. There are dozens of practical problems with the idea more serious than "it would cut une

The thought experiment is predicated on just application of the policy. There are dozens of practical problems with the idea more serious than "it would cut unevenly across socioeconomic and racial layers." The carrot/stick idea is interesting though. I wonder if you could incentivize manufacturers to make a really good triangulating beacon that would allow a phone to know if it's in the driver area of the car, and whether the car is in motion. The phone could disable all functions for the duration of the drive based on this signal. You'd do this in firmware and ideally using some sort of chain of trust that can't be circumvented by rooting the phone. Free software folks would squawk, but the world might be better off for it.