Personally I can have liquor in the house but if I ever just saw a bag I would run in the opposite direction as fast as my little legs would carry me.
I've got a friend who quit smoking with cigarettes still in his house... It's been quite a few years and the cigarettes are still there. Cigarettes don't turn your life to absolute hell as soon as you smoke one, for me one snort and I'd be off and running, bottle of scotch not far behind.