Wow! Haven't caught up to what's been going on in this thread in about three pages! Very interesting discussion...
A couple of thoughts going through my mind.
First, I don't like the thought of legislating helmet use... and as long as people ski into trees and die while wearing helmets, using the argument that helmets save lives isn't going to be all that effective.
Second, we do seem to be more or less in agreement that helmets can prevent a certain amount of brain injury/concussions, particularly at lower speeds and in skier-skier collisions. When an 8 year old kid skied into me from behind on a green slope at Tremblant, I swear that what went through my head as I was still falling was, "glad I am wearing a helmet!" And I got minor whiplash from that, so go figure.
Third, we've had several threads lately talking about taking personal responsibility for your actions , both in terms of holding yourself accountable if you hit someone accidentally, and also (recently) in terms of accepting the risks of being on the slopes at all.
So, what happens when the following scenario arises: helmeted skier accidentally skies into non-helmeted skier, perhaps even at slow speed. Non-helmeted skier falls and receives concussion that could largely have been prevented by having worn a helmet. Family of concussed skier (or skier him/herself) then sues helmeted skier for colliding with him in first place.
What do you think? Is helmeted skier entirely at fault? Or should unhelmeted/concussed skier bear at least some responsibility for having unwittingly sustained an injury that they could have avoided through the use of protective gear?
Just thought I'd muddy the waters a bit on this fine morning...