As for being "responsible" adults, that has more to do with how they are being raised. If a child is raised to accept responsibilty he can act responsibly. We don't do that anymore. We tell them, "you are not responsible until you are 18!" Sooo, they think they have a get-out-of-jail-free card until then. Of course they act the fool, it's just "high-jinks".... until it's not and someone dies or goes to jail.
That wasn't the case when I was growing up. This "Dr. Spock" coddling of children started around that time but youth back then WAS more responsible in the main. The more you train a teen to be a "child" the more likely you are to develop adults with a juvenile mentality. The sooner you start giving a teen responsibility and the respect that goes with it, the sooner they learn to be responsible adults.