On Saturday, I and two other people climbed Belly Roll.
When we got to the top of the second pitch, we saw another party rappelling down on a 2 ropes rappel from a tree over Jackie.
My partner could not help, to tell them that they should not run the rope directly around the tree ;( although many people had already done it there, seeing the status of the tree) because that kills the tree and damage your rope.
After this we decided to avoid this kind of situation in the future; therefore we slung the tree with 2 1" webbing slings and we used two rappel rings.
Everybody is invited to reinforce the anchor with more cordage if you are up there and maybe, a steel ring; (we did not have anything more than what we put there).
For the moment enjoy the two rope rappel station instead of the walk, and lets try to not damage more trees anymore.