[A CA Guy]

Well for your information there are laws that require separation in cooking of foods.
I am alergic to seafood. I went to a Hometown Buffet and had fries. I broke out in welts all over my hands and arms. Later found out they cooked the fries in the same oil as the fish.
THAT WAS ILLEGAL. So yes, sometimes due to 1 person, some things have to be done a special way as to not kill them.

[Just another Joe]

Well for your information there are laws that require separation in cooking of foods.

We're not talking about food provided by the school.
We're talking about a kid bringing a peanut butter and jelly sandwich from HOME.