You know, that's an interesting thing, one of the guys rode into the back of a parked freelander at speed on a TT bike A few months ago, his face was pretty messed up as you can imagine, nose nearly sliced off and loss of teeth, no breaks or any "major" injuries though, obviously he was wearing his helmet, I haven't got round to asking him yet his thoughts on whether his helmet did any good or not, but I will.
My bike is actually not set all that radical as it kills my back if it's too aggressive.
You can understand why TT organisers emphasise keeping your head up!
Which is the really rather pertinent argument (supported by Headway) for a full face helmet.
Even supported by the professionals
Given the anecdotal evidence, support by the professionals who deal with the injuries, and a pro helmet charity such as Headway.... how can people be so stupid as to argue against full face helmets?