What happens when the kid eventually becomes an adult? They have to buy a new device? That seems like an really great way to create a bunch of unnecessary e-waste.

Also, letting Big Daddy Government control what we show the kids has got to be one of the worst ideas I've heard. Propaganda machines that parents have no power over? No thanks. That seems like the most likely outcome of this sort of measure. Next thing you know, every computer will also have a "activist" and "journalist" bit; once you normalize role-based access controls, the catgories will only ever expand.