Still interested in hearing your answer, and your reasoning behind it, as you didn't engage with the question.
On the supermajority bit, in more and more countries there's already a supermajority for banning phones from schools, more and more for banning it for children altogether, and so on. I think that's a clear sign people would actually be in favour of quite a lot of measures to tone things down, like the one I mentioned. Total bans I wouldn't vouch for.