Truth: Youth, who's to blame?

Bad parenting, poor decision-making, peer-pressure, access to drugs, the media, irresponsible adults
I will not solely put the blame on children for having sex or doing drugs. It is wrong but the guardian and any other adult in the child's life is responsible for the child's well-being and actions.
If an adult knows a child or teenager is having sex or doing drugs, from the point of the realization, the adult takes some responsibility.
If a child does drugs, I would ask the parents:
Where did their child get the drugs?
Who did their child get the drugs from?
How do the parents not know their child is doing drugs?
Where were the parents when the kid was doing drugs or getting the drugs?
We live in a sex/drug-obsessed society. I remember at 13 years old, I wanted to be like the older teenagers and adults in my neighborhood, like the half-naked models on magazines and the beautiful actresses on the movie-screen, I wanted to be older, SEXY. I didn't realize how having sex or doing drugs would affect me, I just thought it was what you were supposed to do because my role models did it.
Every child teenage adult, who crossed my path, affected me. The teenagers, who taught me how to smoke my first cigarette at 8 years old, affected me. The 13 year old who showed me "sex" at 8, affected me. The physical mental and sexual abuse I experienced as a child affected me and all the adults who tried to have sex or give me drugs from 8-17 years old, affected me.