I was going to write a rebuttal to this, but mindslight is right. It is the government's job to restrict the usage of technologies that can be very dangerous. But in all the cases we have, the restriction is done via the law enforcers, not via the technology.
It's mandated that you can't drive a car without a license. But the enforcement is done by the cops, not by the car.
It's mandated that you can't own a gun unless you meet certain criteria. But the enforcement is done by the cops, not by the gun.
And so on...
It can be mandated that you can't use a phone while driving. But the enforcement must be done by the cops, not by the phone. If the cops don't do it correctly, then the right course of action is to fix that, not to restrict the phone.
Because once we do start restricting ubiquitous personal devices in order to enforce the government's rules, it will never stop. Democracy can never work if freedom is granted by the government - the people must be able to do whatever they want, with the government potentially revoking a person's freedom after the violation if it finds one.