Reading this and someone's comment about "Please don't bring peanut products on airplanes, I don't want to go into anaphylactic shock" reminded me. I was at a baseball game and someone sitting to my right kept glancing warily at someone sitting to my left, who was shelling and eating peanuts in the manner common at baseball stadiums (cracking them, dropping the shells haphazardly on the ground, eating nut, repeat). Finally the person on the left said "Is there something wrong?" and the person on the right said, "I am deathly allergic to peanuts and am trying to make sure no peanut shell gets near me."
The person on the left just looked at the person on the right, turned slightly away, but continued to eat his peanuts in the same manner.
I'm a pretty big baseball fan, but I don't know that I'd risk my life to go to a game if I had a severe peanut allergy. I certainly wouldn't go around demanding everyone near me not eat peanuts, it's impossible to control that...