I've been wondering why peanut allergies seem so much more prevalent today than when I was a kid. I've finally seen a good explanation -- paranoia about kids eating peanuts!
'Dr. Christakis notes that while it’s reasonable for schools and parents to take basic precautions, there is no scientific evidence that nut bans are particularly effective at protecting children. But more important, he argues, is that limiting widespread exposure to nuts can make things worse. The “policy of avoidance” means that fewer children are being exposed to nuts, likely increasing their risk for developing an allergy. A 2008 study in The Journal of Allergy and Clinical Immunology of 10,000 British children found that early exposure to peanuts lowers risk of allergy, rather than increasing it.'