I am interested in this new pastime however, I do have some concerns. I have noticed several caches on Native reservations in AZ. This is not acceptable. First it is tresspassing! Second, how would you like me to list a waypoint in your backyard? I am also concerned about caches that send people to archaeological sites. As benign as this pastime may seem, most arch sites would do better with less visitation. As much as I would like to believe that all geocachers are respectful, odds are this is not the case. Search on with respect, please!