Most of the school's around here are nut-free, including my son's daycare. I didn't realize it was a regional thing. I've just never encountered the ban anywhere other than schools. As a person with food allergies, I know it is very possible for people with extreme allergies to have a reaction simply by breathing in food allergens or touching a contaminated surface. Scary stuff!
I do have a laptop lunchbox. It's pretty easy to pack, I just make sure to keep it upright so I don't spill the food juices all over the place. Generally, I use one container for some sort of bean, one for a veggie, one for a starch, and the other for fruit, cookies, or some other extra. Sometimes, I'll take out a couple containers to fit in a sandwich or bean burger.