It's disgusting those who litter. It is skiing! You are outside enjoying mother nature. Ruin it for others with your stupid litter.
It is prohibited in National Forests and State Parks.
Littering isn't allowed in a state or national park? You don't say!
Unfortunately I do not see how you fix this problem, humans have proven (and since long before bud light cans existed) that wherever we go, we manage to leave our trash everywhere.
I think mountains overall do a good job of keeping places clean despite the shortcomings of their clientele. Have you guys ever seen any other outdoor event area after a large gathering like a music concert, sporting event, etc. It makes the area under a chair lift look as clean as an operating room.