Honestly I'm gonna go right off the bat and say it..... a lot of you kids out there have been way too fucking mothered growing up. SKIING IS  DANGEROUS.  The resorts do a really good job of making you feel like its not.... but it is.
Every time you pop your bindings on, your taking a chance. Every time you get on a lift, there is a chance that you might get seriously hurt, and or die and no helmet or pads is going to completely take that away.  Have you guys never read the giant liability clause at the back of every lift ticket you buy? Have you never read the alpine responsibility code ?
This isn't a fucking rollercoaster, your actions on the hill have opposite reactions. If you take a 50 foot jump, and over shoot it on your head..... I'm sorry but no amount of helmet will ever save your life from that.  You want real prevention, it's called TRAINING. Work your way up from the baby park, take some lessons, ride with guys who are better then you. Nothing beats common sense, experience, and skill.
Should you wear a helmet while you train? Of course, but that's where common sense comes in. Are kids going to try to copy shit, and ride without a helmet ? Yeah, but those lemmings deserve to get hurt, and will learn from it in the process.
I know after 19 years of skiing that i can ski without wearing a helmet on many parts of the mountain and not get hurt, and if I push myself, or am skiing near rocks then I might wear one.
Enough of this Gestapo "EVERYBODY WEAR A HELMET ALL THE TIME" shit. If you can deal with the risk of our sport with intelligence then go play some other pussyass sport like soccer, or golf. Woun't get hurt doing that.