I voted never because of school restrictions. In reality DD's school has none, but her daycare/afterschool program does. I've been trained "no nuts" since she started daycare at 2, and I'm just not comfortable packing her a lunch for school that is not OK for daycare as her lunchbox and leftovers, etc. travel with her.
As I posted in the other thread, I was traumatized by a food allergy related death in my high school. I would never want to be the cause of a tragedy like that!
ncat
mama to DD 12/04, DS1 11/08, and DS2 7/13