1. A media playback system comprising: at least one rendering device; at least one environmental sensor including an RFID sensor configured to detect RFID tags; at least one environmental data server; and a computing device including a storage device and coupled to the at least one rendering device, the at least one environmental data server, and the at least one environmental sensor, the computing device configured to: select an instance of media stored in the storage device; render the instance of media on the at least one rendering device; and while rendering the instance of media, gather environmental data using the at least one environmental sensor to be provided to the environmental data server; and wherein the environmental data server is configured to verify the environmental data and further configured to determine a number of instances RFID tags were detected and respective RFID tag identifiers, determine a number of the instances RFID tags were detected that are associated with the respective individuals who should not be included in the environmental data based on their respective RFID tag identifiers, and omit from the environmental data the number of instances RFID tags were detected associated with individuals who should not be included in the environmental data.