The idea that some people are extraordinarily sensitive to peanuts, to the degree that they can't be in the same room as someone eating a Snickers bar, is bunk. The American Academy of Allergy, Asthma & Immunology states[0]:
> There is no evidence to support peanut vapor as a cause of reactions or that peanut dust itself circulates and causes reactions.
I am a little surprised to see such uncritical propagation of this myth on HN.