Change your lifestyle? Hmmm... I am grateful for the contribution that warm nuts make to my quality of life, but a flight without nuts would barely register as a change in my lifestyle.

Here's another "peanut allergy" story for this thread - IIRC, there was an olympic athlete in Scotland who died a few years ago from a sandwich that contained a trace of peanut oil in the mayonnaise. Peanut oil was not the main oil used in the mayo and it wasn't even listed as an ingredient. This incident really brought the severity of peanut allergy home to me.