(((((((((LoosingControl)))))))))))))

What's important is trying to keep YOURSELF safe and clean and away from stuff. Also finding some other (clean) friends would be helpful. I'm not saying to "abandon" your friends, just to get a support system for yourself.

Honestly though, people don't stop behaviours unless they're either cornered, or choose to stop by themselves. (Unfortunately)

If you know they're doing illegal stuff, you could always report them to the police the next time ... and maybe eventually they'd find themselves in a treatment program where they could get clean and realize what they're doing to themselves.