The standard OP is describing doesn't exist. So whether it "fails to achieve most of the social goals" is yet to be determined. Blocking unrated content seems like a pretty desirable feature to me. Why wouldn't that be one of the "social goals"?
You can turn on filtering and subscribe to a whitelist today. People don't seem to be satisfied with that solution. Why not? The answer to that question is what needs to be solved.
You can turn on filtering and subscribe to a whitelist today. People don't seem to be satisfied with that solution. Why not? The answer to that question is what needs to be solved.