This can be a good and useful discussion. Maybe we're reading your posts wrong but it sounds a lot more combative than I think is helpful.
We're all trying to figure this out and discuss together.
While I agree, the argument behind Grace's stance has led to fleeting thoughts floating through my head. I just haven't written them because I'm wary there isn't a way to discuss without getting political. Cell phone bans in classrooms is a no-brainer to me and just about anyone I know in education - removing them from the classroom enhances the learning experience and there is no defending the counter. That said, that dynamic is due to our reality driven by leave no child behind, the 14th amendment, a general environment in which parents don't hold their kids accountable, and admin are more willing to bend towards them than defend their teachers.
Change the laws and better support our teachers, then we can have a real debate on what to do about cell phones. I can see the argument for allowing the privilege as long as certain standards are met, dictated locally, but in our current world in which there are no consequences for bad behavior (some hyperbole) there's no conversation to be had.