I would strongly suggest that people with airborne reactions to peanuts write the Food Allergy Network, noting their specific circumstances and reactions with airborne exposures. The Food Allergy Network has the peanut/tree nut registry - Each exposure is to be reported.
The fact just may be that airborne reactions are under-reported. FAN should be a good starting point, since they participate in research efforts.
Their phone number is 1-800-929-4040. Their e-mail address is [email]fan@worldweb.net[/email]