Paul Cassel wrote:
Mitch Haley wrote:

I grew up believing in God and motorcycle helmets. It wasn't a far
jump from there to believing in bicycle helmet advertising. In the
late 1980's I saw the rapid changeover from helmets to foam hats and
began to think that style was more important than protection. It didn't
matter that much to me, I still had a stockpile of helmets that would
last me a while. It was here that I first began to realize it was all
about style and profits, and not at all about injury prevention.

Do you wear motorcycle helmets on a bicycle? Nobody I've heard of denies
motorcycle helmets prevent some injuries in a crash. The debate is if
wearing of them causes more crashes due to limited scan, hearing, etc.
OTOH, there seems to be some inferential evidence that wearing helmets
on a bicycle can create injury.

The only evidence along those lines that I've seen discussed here is
statistical data showing that in some areas greatly increased helmet
use was accompanied by an increased risk of injury per rider. Whether
that was due to greater risk taking (risk compensation), fewer riders
leading to less awareness by motorists, injuries due to the increased
size and weight of the helmet, or other factors not considered in the
studies has never been analyzed. Nor do I think there is sufficient
data to do such an analysis.

That's something I've never heard
claimed for motorcycle helmets.

Then you haven't seen many pro and con arguments on motorcycle helmets.
The debate on the impact of helmets on neck injuries has gone on for
a long time