Nowadays the things are really different from our parents and grandparents time. Because the teenagers don't thing about their futures and the consequences of their acts. Not by absences of information, they don't do things carefully. They loose their futures as a normally thing. They difficultly have a job, but still loose money in parties and drinks.
Who suffers with their actions are the kids who born without being wanted. Their parents don't have time and maturity to spend with their kids education. The kids grow badly and don't see their parents as modals, they don't see their childhood in a beautifully way.
However, some parents have the knowledge about these facts. They do this to run away from their responsabilities and they believe that, somehow, all it's going to be fine. But the World is not a dream factory and they notice this until be too late.
So they only grow up when some bad thing happend in their lifes. They have to forget their teenager time and learn about the growing up world to survive and find their own ways in life.