1. A computer-implemented method for managing privacy rights of a user related to the delivery of content, the method comprising: linking a plurality of devices associated with a user based on user login information when accessing a service from different one of the plurality of devices; providing a global privacy management interface that: provides a selection tool for enabling a user to review privacy options and interests associated with the user by a content delivery system based on user interactions associated with respective ones of the plurality of devices; provides controls for presenting a list of identifiers that are associated with the user and interests associated with each of those identifiers, each identifier associated with a requesting source having been used by the user to access content, wherein the identifiers correspond to different devices of the plurality of devices associated with the user; and enables de-selection of individual interests on a per-identifier basis; receiving a de-selection of an interest to be applied to a first identifier while maintaining the interest in association with a second different identifier; modifying the privacy options and interests for the user based at least in part on the received de-selection; determining, in a server system and using one or more processors, content to deliver to the user in view of the privacy options and interests; and creating a global privacy policy for a given user, the global privacy policy including a mapping of a plurality of cookies associated with the user; wherein each cookie is associated with session information and any enumerated preferences of the user, either inferred or explicated defined, the preferences being used to determine content to be delivered to the user in response to received requests from the user, and wherein creating a global privacy policy includes aggregating privacy policy information from each cookie in the plurality of cookies to form the global privacy policy.