I think your comment ties back into one further up the thread, where someone said that this is good as a collective decision, and extremely bad as an individual "choice". If you send your children to a school where this is common, you get to reap the obvious benefits from your kid not having access to these harmful devices. Whereas if you make a "consumer choice" to be a responsible parent, you just set up your kid to be resentful of you, since you excluded them from one of the most basic activities that their friends have access to.