Not as extreme as having someone die on board though, is it?
Buffer zones don't really work on aircraft due to the recirculated air. The level of danger is magnified by the inevitably slower response of the emergency services - if you're over the Atlantic, it's not even like you can do an emergency landing.
The whole point of telling people is that when some / all passengers are asked to refrain from eating nuts, they have had a chance to bring alternative foods with them, which is only fair really.
I am making this comment as someone with a number of food allergies which result in anaphylactic shock, use of an epipen etc. Nuts isnt one of them but blue cheese/brie is. so if its around, on surfaces, air borne particles etc I can have a problem. You cannot ban one food like nuts and not ban all the other foods on a flight that could give other people with allergies the same sort of reaction. why single out nuts? I find travel scary because of my allergies but I try to take precautions like letting the airline know when I book, speaking to the people either side of me if they have their own snacks with them just to make them aware, taking masks and wipes with me to ensure that there are no contact surface mistakes. Its a pain in the arse but I was born like this.
so if you ban nuts why not blue cheese, dairy, bread or anyone other of the allergens.
I have to say that I do agree, and I'm not sure why nut allergies get taken so much more seriously than other equally serious allergies like milk.
I wouldn't ban bread for the sake of a gluten issue though; it's never immediately life threatening, and even labelled gluten-free foods can contain 20ppm of gluten.