I agree they should be banned. My daughter is allergic to peanuts and chickpeas. An airline we travelled with served peanuts on a transatlantic flight despite me asking by phone before we travelled, at check-in, at the gate, and as we boarded, if they could please refrain from selling peanuts. Her last serious reaction at school was NOT as a result of eating them (probably contact, possibly airborne). Luckily she didn't have a reaction on the flight, but we were diligently wiping everything she touched and it was an anxious 7 hours.
People who say "just have your epipen then" don't realise how horrible a severe allergic reaction is for someone. It's painful and terrifying.
To those idiots who say an airborne reaction is a myth - why would you discount people's personal experiences!
Also, accusing those with life threatening allergies of being attention seeking is just thoughtless and cruel. My 12 is mortified every time she has to ask or explain about her allergy, and would dearly love not to have to do it.