Media device systems and methods are operable to provide security against unauthorized access to content or unauthorized control of the media device. An exemplary embodiment detects a wireless signal, with an identifier, that is emitted by at least one mobile electronic device that is currently in possession of a user, determines the identifier of the at least one mobile electronic device, retrieves a plurality of stored mobile device identifiers that identify each one of a plurality of mobile electronic devices, compares the identifier of the at least one mobile electronic device with the plurality of stored mobile device identifiers, and then permits access to restricted content or permits the media device to perform a restricted function only when the identifier of the at least one mobile electronic device matches one of the plurality of stored mobile device identifiers.