what with elf on the shelf

An interesting holiday tradition. The concept of the elf on the shelf is that a small elf doll is placed in a household during the Christmas season. The elf is said to observe children's behavior and report back to Santa Claus. It's meant to encourage good behavior in children. Some people have mixed feelings about it. Some enjoy the magic and tradition, while others think it's creepy or controlling. But in the end, it's all in good fun. What do you think?