I have made several overtures to help Coronado over the years with trail maintenance. There are more than a few places in the Catalinas that haven't seen a trail crew in DECADES and probably won't because of their relative lack of use and remoteness. I always call and speak to the same someone who is based out of Sabino and describe what I want to do (Move this large piece of deadfall, trim this cholla back a little, etc.) Every time, without fail, I get a stern "No way" and a lecture about how unqualified I am to be doing such things. When I explain that this kind of work is not unfamiliar to me, having a yard full of native growth, and is essentially within the reach of any reasonably fit ten year-old, I get more grief. I once even volunteered to go to their training and help with projects they needed assistance with (Rather than what was just bothering me) and never got a call back.
I don't know anything about what these guys did, or for how long, but it seems that the only difference is that I called and asked for permission and then continue to step over the tree and around the cholla year after year having been denied that permission. I would further speculate that it involved mountain biking as it is a cornerstone of that community (For better or for worse) to create trails, but I could be way off. The Forest Service has a difficult juggling act to perform and a lot of land to control. That said, I cannot understand why they don't make more of an effort to embrace help when it's offered, especially responsible and earnest help. To take it a step further, why don't they go out and ask for it?