I really understand the frustration of young buddies here , but yes age got a science & sense behind it and just try and see for doing everything you need to look at the age either it is studies, marriage, drinking alcohol, lot of things !! and you cannot argue on this, because you guys will understand it when you attain that age practically !! nothing more to it.
All these rules are well examined and made to live safest, so as far as possible follow them on your own with some personal discipline rather than expecting you to be caught by some cop.
Rules are good for any anything in life, hence respect them !!