Honor systems in general are symptoms of social breakdown - a last resort or marginal adoption, when or where a society cannot establish community and mutual cooperation via the normal childhood upbringing, religion, or family/tribe/town custom, and lacks the power to coerce. They provide a way to behave well in the absence of all coercion, as most people want to behave, without taking on the role of victim or sucker. In this role they are invaluable. Addictions, like tobacco or opium or alcohol, subvert and undermine them at the root. They won't work, and pretending they will is feckless.