Exactly, have sites merely disclose rough categorizations, move the decision-smarts to devices, and put control in the hands of the owners of those devices. Th

Exactly, have sites merely disclose rough categorizations, move the decision-smarts to devices, and put control in the hands of the owners of those devices. This places a majority of the cost of implementation on the people who actually want to use it, avoids a creepy Orwellian surveillance system, and enforcement is moved into a physical immediate reality that the average parents can see and monitor. It also means you don't need to worry about visitors who are unmarried under the age of 16 years and three full moons who may not see unclad ankles in Elbonia.