I think they should just make a special NUTTERS plane for all the nut allergy sufferers to board and go on holiday together - problem solved lol
Seriously, I cannot understand WHY people find the ban concept and life threatening allergy so hard to grasp! Surely people can't be this dense....or uneducated/ unaware/ ignorant 
OK let's break it down. Most people will have been breathless at one point in their lives eg. long walk/ run/ looking after kids etc Well think of that moment and imagine not being able to recover your normal breathing immediately, then put yourself high up in the sky in a tiny metal cabin away from emergency rooms and medical help! Imagine the breathlessness getting worse in a short space of time, like someone with their hands around your neck squeezing the life out of you........