I was astounded to find out from threads like this at BF, that there are supposedly rational people out there who think that riding a bicycle without a helmet is better than riding with one. The willingness of people to jump onto bandwagons based on "the generally accepted wisdom must be wrong" is a bizarre feature of human nature. Creationism, global warming denial, 9/11 conspiracy theorists, and now I can add the anti-helmet crowd to that list.