You stated that your sons could have a reaction by someone BREATHING on them after eating PB.
I asked a simple question - What if a child has a PB sandwich before school (at the bus stop perhaps)?
And I'll ask again, why don't we accomodate the photo-sensitive? Aren't their "special needs" as important as your sons'?
You never addressed bikepacker's question -- what about the child who eats peanut butter at breakfast, then comes to school?
If I had children with literally life-threatening allergies, I would not send them to school every day with scores or hundreds of little kids who could conceivably kill them just by bringing a Baby Ruth to school.