I ask because of a bad experience with my daughter's teacher who was encouraging children to bring peanuts to a school picnic. To my mind this is negligent when there is a severely allergic child present because of the cross contamination risk. I was more than slightly upset when taking him a letter about the actions necessary to protect my child in those high risk conditions. The way in which he defended it made it worse. Therefore I was so angry I told him he was an uncaring teacher and went to see the headteacher (much better discussion).
After our discussion I can understand why some parents assault teachers (not condoning it but I find it more understandable!) Do teachers deliberately provoke parents as a form of defense?