The police have taken to videotaping people who are heavily drugged and out of it. For instance, someone laying stoned in an alley with a needle hanging out of his arm. Of course medical services are summoned too.
The police then make the effort to track these people down to find them at a time when they are not intoxicated and show them the video of themselves... trying to wake them up to the truth and consequences of their addiction.
I don't know how effective this effort is, but I appreciate the police acting like decent human beings rather than bully thugs.