Hardly!  

I was fortunate enough to choose an occupation at that age  which had enough structure and social supervision so I was mostly out of trouble.

When you turn 18 in basic training during the Cuban Missile Crisis, you have a drill sergeant to worry about; those people are trained and experienced enough  to know what young men and women are going to get into next and prevent/punish those who have problems with standards.

A few years of discipline after that can help develop a lifetime's habits.