In hindsight, people who have been addicted to substances regret their poor judgment. If only someone had told them of the dangers, or if only they had heeded the advise. Listen to a group of people who have been addicted to opiates discuss what they wish they had been told.
Were you told about the dangers of drug use?
If you were told about the dangers of drug use, was it effective to some degree?
How would you explain the dangers of drug use to a child?
What are the protective tools that will decrease the chances that a child will turn to illicit drugs?
How To Talk To Kids About Alcohol & Drugs, Child Development Institute http://childdevelopmentinfo.com/ages-stages/teenager-adolescent-development-parenting/talk-to-kids-alcohol-drugs/