I have personal experience with one item. About five years ago while snorkeling off of Orient Beach my friend Marge found a conch shell. She was so proud that she dove down for it that she wanted to take it home. Well, we only got as far as security and they confiscated it. I asked them why as it wasn't a living thing. The security person said that it could be used as a weapon. She then held it up and made a clubbing motion with it. Okay, one can never win with security. The conch shell was lost forever. Wayne <><