In one implementation, a social media device receives social interaction data including an identity of neighboring mobile devices that have been within a physical proximity of an object mobile device. The social media device hosts a social network service and provides content to a user associated with the object mobile device according to the identity of more neighboring mobile devices. The user of the object mobile device may opt to receive content only from those users that are identified in the social interaction data. The user of the object mobile device may opt to permit only those users that are identified in the social interaction data to receive content generated by the user of the object mobile device. The user may opt to alter the status policy seen by other users so that only users that are identified in the social interaction data see the user as available or online.