I was doing a day hike in the Three Ridges Wilderness of the G.W. National Forest and I stopped by the Maupin Field shelter to check it out and read the trail notebook and such, when i stood up and my head hit something... a stick hung from a piece of string with half of a plastic soda bottle around the top of the string, and there were about 10 of them hung from the ceiling.
I am just wondering what's the deal with this, why people do it, and is it common in all of the shelters?