22. The system of claim 20 , wherein to generate the alert, the at least one processor is configured to: find a matching image, wherein the matching image includes a facial image that substantially matches at least one facial image in at least one of the first set or the second set of facial images; detect at least one of the predetermined types of display events in a posted image, wherein the posted image includes a matching facial image that substantially matches the at least one facial image; notify the user about the at least one of the predetermined types of display events; and receive an input choice from the user.
22. The system of claim 20 , wherein to generate the alert, the at least one processor is configured to: find a matching image, wherein the matching image includes a facial image that substantially matches at least one facial image in at least one of the first set or the second set of facial images; detect at least one of the predetermined types of display events in a posted image, wherein the posted image includes a matching facial image that substantially matches the at least one facial image; notify the user about the at least one of the predetermined types of display events; and receive an input choice from the user. 26. The system of claim 22 , wherein to find a matching image, the at least one processor is configured to: detect a facial image in the at least one image; determine the facial image to represent the subject name; and assign a tag associating one or more of the subject name and the user to the at least one image.