I'd love to see Minecraft chest only accessed by the players that place them. As to discourage others from stealing items. Giving permission to only the players you wish to access it. As well as keeping others < Not the player that placed the chest > from destroying the chest to get at items inside.
Wow, this is a very good point. Basically completely flaws the idea.
Unless it was made that it couldn't be placed with x blocks of a door.