This was an interesting post to read, and I applaud you for trying to help people understand. I volunteer in a Children's Centre, and one morning we were looking after a child with a nut allergy while the mother was attending a class. The very next kid to come into the centre had a handful (and mouthful) of nuts and went straight onto the climber where the child with the allergy was playing. I immediately helped the child down and took her over to her father, where I explained that the centre was nut free and that it was particularly important that day as we had a child with a nut allergy present. The father not only didn't see the importance of keeping the centre nut-free, he also disagreed with the policy of not allowing kids to eat food while on the climber! Some people will just never get it, so I can appreciate your need to be a little 'nuts' about it sometimes!