The best rating systems have three attributes: They attempt to describe, rather than prescribe, what entertainment media should contain; they are particularly suited to their particular media forms; and they were created with little or no direct input from government

The [ESRB] system for evaluating computer games works better than most Parents can tell, at a glance, exactly what they might find objectionable Congress has held hearings on the video game industry and threatened to regulate content, but the system emerged almost entirely as a result of voluntary private action, and has worked well.