There are various voluntary ratings associations in existence, focused on their own version of "acceptable." Commonsensemedia is a good example, they have a US

There are various voluntary ratings associations in existence, focused on their own version of "acceptable." Commonsensemedia is a good example, they have a US-centric Christian bent that doesn't agree with my own, but for the most part their information about movies and TV for kids is useful to me when deciding what to show my kids. So there seems to be a treasure trove of voluntarily produced data on content by various groups on one side, and a desire to automate applying those ratings to my kids in a default whitelist then allow-by-exception model. If it were technologically possible, I'd even be thrilled to have a default whitelist created by the parents who are my Facebook contacts. We do that manually today. "Hey, have you seen The Incredibles? Is it too scary for my three year old?" Anything that allowed parents to do that, and that worked in a widespread way, would be adopted immediately and would probably be worth a subscription fee.