I don't know how feasible that is. I'd just like to know folks can turn left, turn right, and stop with some competence before going beyond anything green. If I go to a public pool the lifeguard will often ask me to show I can swim all the way across the shallow end of the pool before allowing me in the deep end. When I was a teenager I went to a skate park in San Diego while visiting my grandfather out there. The folks working there wouldn't allow me to skate the pools until I showed them I could pump the half pipe and kick turn on vert there. I'm all for freedom and all, but it is pretty stupid to just allow anyone/everyone to bomb blues and blacks that couldn't stop if they needed to.
The thing is, a ticket allows you to access the whole mountain and doesn't discriminate by abilities. It used to be that people had common sense, and wouldn't venture themselves or their young kids (this really pisses me off) where they shouldn't go. I know that it's probably never going to happen... I mean, logistically is a mess, but having a skiing license that shows your ability and therefore allows you access to harder terrain (you don't have to be a pro just have sufficient skills and knowledge to be safe and not be a hazard to others) would be great.
You could either obtain it by completing ski courses, or testing out (testing should be free obviously)
I think that every skier should be able to enjoy the mountain, but I also believe it's important to have areas/terrain that enables those who can to let loose in relative safety. You wouldn't want to be in a main park hitting some crazy trick and having me trying to jump and crash cuz i have no clue of what I'm doing... or you wouldn't want to be ripping down a double black and find me chilling in your path under a drop off cuz i though it was a cool spot to take a picture...
some of these things need to be taught to ensure the safety of every body, especially these days that winter sports are getting more and more mainstream and the mountains more and more crowded.
PS sorry for the