I think anyone who doesn't use a bicycle helmet is ignorant.
Seems to me that the "pro-choice" folks tend to be anything but ignorant on the subject. The amount of research posted on this thread would seem to support that view. IMO, it's the "If you don't wear a helmet you're a moron!!!" crowd that is basing their argument, if that word is not too dignified, upon hearsay, peer reinforcement, and personal anecdote.
I personally think most of the bicycle helmets out there are quite stylish. Maybe I use one 'cause it save me from a nasty headbruise when I was seven.
At least you're not part of the 102% of the modern cycling population that would have died if not for a helmet.
According to statistics no biker in Finland has ever died of headtrauma while wearing a helmet.
Um, sure. Guess I won't hold my breath waiting for a cite for that one.