In the US, the idea that the federal government could issue such a ban would be preposterous. It's a matter of principle. The state shouldn't be regulating these kinds of things, it only makes a mockery of itself.
> In the US, the idea that the federal government could issue such a ban would be preposterous.
Yes, but only because the US is a federal republic where the states, not the central government, have general police powers. That kind of blanket regulation would not be particularly out of line with the kind of thing state laws regulate in schools, however.
so who should be regulating what happens in public schools?