IMS networks and methods are disclosed for selectively blocking advertisement content on a per user identifier (ID) basis. A subscriber database in the IMS network, such as a Home Subscriber Server (HSS), stores service profiles for IMS users. The service profiles of the IMS users are also provisioned with advertisement blocking indicators that are associated with a user ID of the IMS users. When a request is received in the subscriber database for a service profile associated with a user ID, the subscriber database checks the advertisement blocking indicator associated with the user ID to see if advertisement content should be blocked for this user ID. If so, the subscriber database modifies initial filter criteria (iFC) associated with the user ID, which in essence blocks the advertisement content from being sent to the IMS user.