re helmeted cyclists passing judgement and 'the times, they are a changing', let me relate a little story.
My old club (largely social, CTC style) has been for the last 3 or 4 years actively touting for new members. It follows a change in leadership and is intended to keep the club alive with new blood (as they unfortunately say) I turned up for a ride a couple of years back (sans helmet as ever but I'm actually one of the few 'old school' riders not to wear one) and one of the new members tells me that I should be wearing one as it's the club's policy (it's not but it is advised) What surprised me was that before I could respond, a number of other members jumped in and politely told the new member that it wasn't a problem.
I no longer ride with the club, not just because of that but partly, and prefer to ride alone these days. I acknowledge that I am a dying breed. One that started riding before the cycle helmet existed (or, at least, was popularised) I have never felt at risk on my bike and am completely comfortable not wearing a helmet. I accept there's a need in certain contexts and accept equally the popular portrayal of smiling happy families buckling up for a family friendly river side cycle path ride. It's just not my world.
For me, that's a debate as much as any safety issues. I'm getting on and worlds have changed on me. As they do with many issues. Helmets are part of what cyclists do now, part of the agenda and becoming unquestioned. Not rightly nor wrongly, not sadly... just is.