SpannerInTheWerks
I fully understand. My daughter also has a severe nut allergy that necessitates the carrying of an EpiPen and all of our family being familiar with its operation.
I can fully understand how anyone who has never seen how an extreme allergic nut reaction can affect an individual believes it to be trivial.
My daughter avoids eating anything that cannot be guaranteed not to contain nuts. But, she lives with this, travels, and is extremely careful in unfamiliar environments.
Perhaps once a year she makes a 'small' mistake that causes swollen eyes and lips that necessitates action (usually antihistamines is enough....). It is real and not a pleasant thing to live with.
However I do have doubts that the reaction occurs through airborn nuts. In my experience, through my daughter, it is only through direct contact.
C