1. A method comprising: collecting identifying information associated with media exposure using at least one of a microphone, a camera, or an optical sensor of a first device associated with a user; determining a geographic location at which the identifying information was collected during the media exposure; comparing the geographic location with a designated geographic area; in response to determining that the geographic location of the media exposure is within the designated geographic area, using the collected identifying information to generate a custom electronic program guide for the user associated with the first device; and in response to determining that the geographic location of the media exposure is outside the designated geographic area, refraining from using the collected identifying information to at least one of generate or update the custom electronic program guide absent user authorization.