Regarding the studies about the protein not becoming airborne, it feels like there's more research to be done on severe allergic reactions without actually eating the allergen.
The trouble is no scientist can actually run this study in a meaningful way because you can't knowingly expose a load of severely allergic people to their allergens in a controlled environment ethically.
I had to use adrenaline following a reaction as a 14 year old at a party when I hadn't eaten anything at all so it wasn't cross-contamination from eating. Yes, it was probably ingested via me touching a surface that a nut eater had. It was a shock to me and my parents to find out I could have a serious reaction just for being in the same room as peanuts.
There are pubs that I just can't go into because there are regulars who eat nuts at the bar and within minutes of walking in my eyes and nose are streaming and my face is swelling even if I don't touch my face.
I have had the social discomfort of turning up at events and either having to leave immediately or to ask the host to take the bowls of nuts off the buffet table.
On a long train journey with no other available seats I had to ask people nearby not to open a packet of nuts I saw them get out. I offered to go to the buffet car and buy some alternative snacks for them but they were lovely about it and declined.
Whenever someone cooks for me that isn't close family or friends I have to go through my list of allergies and explain that even a small trace will be problematic. Friends clean their kitchens before I visit.
I am someone who hates putting people out so I find it all very uncomfortable having to ask people to do these things.
I'm just trying to point out that it's not all as simple as it appears. For those who can't understand it, I'm pleased for you that you have such great health that you can't imagine yourself in these shoes.
I have other medical conditions that garner a lot of sympathy but the nut allergy really brings out the ignorant selfish side of some people.