Anecdotal.
There are far more teenagers who are drinking irresponsibly - as well as unlawfully, I might add - than there are as you described. Furthermore, you must be joking. Germany? Sorry, but my family lives in Germany. A few years ago our nephew was busted stone drunk with his buddies by their dad. He will still attending Gymnasium. His father expressed great concern over his drinking, and now as a grown young man, the son really has a problem. This is a norm in Germany.
My family has traveled throughout Europe. Young Germans love to brag about their early-age drinking, and they have the Facebook videos, drunken stupor, and “What happened last-night?” stories to prove it.
I know that in Italian culture, children are given diluted wine at an early age. The two cultures cannot be compared in their view and approach to under-aged drinking.
That’s not my experience in Germany. Of course it is conceivably.
My point is, raise the driving age.
Families who raise their kids to drink with a respect for the substance, come out ahead, in my experience.
Any parent has the responsibility to instruct and observe a kid’s propensity, and his family history.
Sending an 18 year old or even a kid who will turn 21 after he gets out of the house, after parents cant instruct them is not necessarily better.