The Rating System on the Internet

What is with the rating System on the Internet. All it does is ask you if your 18 then you answer yes, and boom your in. That's all it takes one simple lie and there you go, your watching something you are not supposed to watch. Will they improve this and make you enter you health card number or something in the near future? They have made attempts to fix this problem by asking your birth date but that has clearly failed. so how will they fix this growing problem