My father use to be hard on Newports & other crap while I was growing up. Once he realized he was poisoning his family, he stopped, but picked up drinking real bad. He will eventually drink himself to death because he really can't help himself anymore. He really thinks it's his problem to deal with. He gets angry, fustrated, & even cries if we drink all the orange juice in the house. He blames us for being wasteful, because we should know who really needs it.
I also nominate perscription & non perscription medication. Sleeping pills & painkillers contribute to more family isolation then even alcohol it seems.