An example is in an article I just came across which suggests that all the drug counseling we do for teens may do more harm than good..Here is a quote
Increasingly, substance-abuse experts are finding that teen drug treatment may indeed be doing more harm than good. Many programs throw casual dabblers together with hard-core addicts and foster continuous group interaction. It tends to strengthen dysfunctional behavior by concentrating it, researchers say. "Just putting kids in group therapy actually promotes greater drug use," says Dr. Nora Volkow, director of the National Institute on Drug Abuse (NIDA).
The article is here, for those who want to see the other side of the story.