No, they don’t have to clean up after themselves. That would be asking too much. After all, the government will do it.
Maybe shutting all parks down would be the right thing to do.
I used to believe that the late Colin Fletcher literally “paved” the way to all this wilderness madness we are witnessing today. However, he respected the outdoors and would never have abused pur great natural wonders. But now I think the corporate suits took over the recreational industry just like the music industry. Sad really, especially if you remember how things once were.
SELLING parks and other federal land would be even better.