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. 24. The system of claim 22 , wherein the at least one processor is further configured to: modify one or more tags assigned to the posted image based on the input choice.