[zdragnar]

Depending on the drug, not continuing to do it may be fatal (this includes alcohol with a sufficient level of addiction).

Knowing that there is a safe place to go and treatment for it might reduce some inhibitions about it, but I doubt that many, if any at all, would actually start doing such hard drugs because of places like this.

More likely, if someone is in a position where they would consider doing it in the first place, they would do it anyway.