Plastic bag bans in supermarkets seem like an easy environmental win, but after years of observing shopper behavior in Vietnam, I'm not convinced they truly reduce waste. When cities like Hanoi imposed fees instead of outright bans, many families simply paid the small cost and kept using just as many bags, while the reusable alternatives took years of daily use to offset their own production footprint. What does your local experience tell you – do these policies actually change long-term habits or just shift the problem somewhere else?