1. A database system implemented using a server system comprising at least one hardware processor, the at least one hardware processor executing instructions to perform: designating a first user as a proxy user of a second user in a social networking system with respect to with respect to an entity in the social networking system, the proxy user having an authorization to publish feed content attributed to the second user to feeds associated with the entity; processing feed content received from a device associated with the proxy user, the feed content to be published in one or more feeds associated with the entity; associating the feed content with the second user; generating data indicating the association of the feed content with the second user; providing the generated data to a display device configured to display a presentation of the one or more feeds in a user interface, the presentation including the feed content and an indication of the association of the feed content with the second user; automatically determining, absent user input and after expiration of a time period specifiable by the second user, that a de-designation condition has been met, the de-designation condition being controllable by the second user; and automatically de-designating, responsive to determining that the de-designation condition has been met, the first user as the proxy user of the second user.