I don't think smartphones should be allowed in schools but as someone who was dumbfounded by the lunchtime cacophony of my peers, I wouldn't lead with that as a triumph.
Those of us who hate the noise of boisterous social conversation are the outliers, but it is a sign of their healthy social environment. I personally was always able to find a quiet spot.
My early dinner, empty restaurant habit is the adult persistence of my teenage preferences, and I don't expect my personal tolerance to be their norm.
The problem, when it comes to smartphone bans, isn't the kids, believe it or not.
My experience (consulting with multiple k-12 institutions) is that it's the parents. If the parents can't be in CONSTANT contact with their kids, it's a problem. People are scared of everything all the time. It's not great.
Schools should provide quiet spaces for kids who don't want noise during lunch. The library should always be open during lunch hours. There should always be an outdoor space for those who want it (unless there is lightening - I assuming you know how to dress for any other weather).
Or we can go the opposite way: for kids who want to be loud during lunch there should be a place for them to do that. Wanting to be loud it too common to ignore, and it isn't like perfume/peanuts/... where we have to force a policy for a minority.
