The whole throwing trash on the ground thing is kind of weird. It's not so much that people do it wherever, I see a lot of kids do it. It's the idea that people do it then throw a fit when they see someone elses trash. (Not saying OP does that.)
I lived in the heart of four ski resorts. Trash is a HUGE problem, especially in the spring time. A lot of people throw their crap on the snow, more snow covers it, then more people throw their crap on top, then by spring we have a huge pile of garbage to deal with. Generally, resorts focus on picking up visible trash on the snow, but not the trash that appears after spring melt. So spring clean up is usually left to the local residents.
The lodge with the most trash every year is exclusive to "America's oldest, largest, and most effective environmental organization". Members will throw a ---fracking--- hissy fit if any other lodge dare have a soda can lying on the bike path, but their lodge will be surrounded with everything from junked mattresses (why they have at least one mattress out on the snow leaves something to the imagination), forgotten sleeping bags, hundreds of Red Bull cans, powerbar wrappers, and Cheez-ITS boxes.