What kind of problem solves this measure? If someone think that minors won't access adult content that person is pretty naive. Only with TV shows, series, movies, music, and games they are going to watch a lot of violence and sex scenes, and most of us knows there are a lot of easy ways to access to this kind of content outside mass media.<p>Letting the usefulness of this measure aside, I think there should be other ways to get your age without using your ID, like using a credit card for example. I don't know if there is any way to get the age of a person using the credit card, to be honest, but at least is an identification method with a expiring date and possibilities to cancel in any moment, not a unique number you can't never change in your whole life (at least in most Western countries I know).