Hamilton is getting stick for not wearing a helmet and not ending up in hospital but Schumacher was wearing one and still got hurt? Assume you've been reading the daily mail for that sort of logic... whilst hardly scientific that might point to: Risk compensation - Wikipedia, the free encyclopedia
Which would explain this: http://www.nytimes.com/2014/01/01/sp...mid=tw-nytimes
As for wearing one on open RIBs... ...is there any evidence of large numbers of preventable head injuries? (not that I've heard - I have heard of some nasty face injuries - but then we would need full face helmets which is a step up from the norm, and why "open ribs" not those with even more vertical surface to smack into). I've heard of more head injuries on racing yachts - so if you were going to start somewhere...
Would be interesting to see if that RYA instructor, who will have specifically risk assessed all his training activities, provides and requires the use of helmets on ALL his courses.