I don't really think of avoiding head injuries as being an example of reacting to "fear as a product". The fact is we know so little about what constitutes bra

I don't really think of avoiding head injuries as being an example of reacting to "fear as a product". The fact is we know so little about what constitutes brain injury that we might as well err on the side of caution even if it seems a little extreme. There's a term for this "the precautionary principle": http://www.precautionaryprinciple.eu/ http://www.precautionaryprinciple.eu/