I'm curious. For those that worry about airborne, would it help to wear a mask? I know people wear them when sick but I would think, as an allergy parent, this would be more helpful than hoping others don't bring or eat peanuts on the plane. Only because I know even in my children's classes where certain items are banned and everyone is notified they still somehow end up in the classroom.
My kids are allergic to pretty much everything except for nuts. Although we've never given my twins peanut because they react to several other legumes already. Much of the food they are allergic to also isn't identified as an allergy on packaging. So we pretty much just have to be extremely cautious everywhere we go. On planes we board early and wipe everything down. Make sure everyone's hands are clean before eating. They won't react from touching but if anything gets onto their hands and makes its way into their mouth they can react enough to go into shock. And as it's not your typical IgE type of reaction there is no treatment to stop it like an Epi Pen. Personally, I would love it if people would be conscious enough of the risks of food allergies to just clean up after themselves and not leave a mess after they've eaten, but it's pretty unrealistic to expect that. When I hear about worries over airborne reactions my first thought was always maybe in risky places like a plane a mask could be used? Same for those with dog or fragrance allergies? Maybe they aren't as effective as I assume but might be worth a try.
We keep clashing with the nut free rules at schools, camps, daycares, etc. because my twins' diet heavily relies on nut products. Nut milks, nut flours, nut snacks, etc. And my older one has major food aversions, intolerances, and many allergies as well as growth issues so feeding him is also a bit tricky. Peanut butter is our go to for him although I do try for an alternative on the plane if it's a short enough trip. If planes were to ever go completely nut free it would make traveling rather difficult for us.