I really like this poster. The shadow of the hand and cigarette appears to be a hand holding a gun. It would look even better with smoke coming out of the cigarette, making it look like the gun was just fired.
Which brings us to the third thing an addict isolates themselves with: worship of the addiction. This may sound fantastical, but worshipful is exactly the word to describe a severe addict’s reverence to the object of their addiction.