13. The computer program product of claim 9 , wherein the non-transitory computer-readable storage medium further includes instructions encoded thereon that when executed by the processor cause the processor to perform steps including: receiving metadata associated with the object from one or more additional users matching the metadata associated with the object received from the user; and modifying the confidence value associated with the user based on the metadata received from the one or more additional users.
14. The computer program product of claim 13 , wherein modifying the confidence value associated with the user based on the metadata received from the one or more additional users comprises: increasing the confidence value associated with the user if metadata received from at least a threshold number of the additional users for association with the object matches the metadata associated with the object received from the user.