Bandit kills villager while he is carrying a log.
Bandit loots villager and takes gate key.
Bandit grins.
Bandit logs off.
Villagers spend four hours trying to find the bandit and making dozens of posts in the forums about how much this game sucks because they lost their key.
Bandit logs in late that night.
Bandit loots village.
Villagers log in to find a single moose head in their storage.
Villagers can't change the locks and spend four more hours making furious posts.
Moral of the story? Leave the main gate open unless the village is under attack. Have each villager build a secure warehouse for their own stuff.