I think sometimes people hide a clever cache without thinking that it could damage nature. I remember one of your puzzles with some great camo that was screwed into a tree. Seen plenty of trees with old treehouses that are still growing away, despite tons of nails pounded into them. Here's a response from HGTV about nails in trees that states it's generally pretty harmless: HGTV
Anyhow, I see your point, cachers should be careful and respect the environment we hide and seek caches in.