From bennywong:

I don’t really see any reason not to start charging for plastic bags. Well, maybe I do. It’d be supremely inconvenient for consumers, but for places like super markets where your purpose of going is to buy groceries, it won’t be hard to bring a couple of canvas bags with you.

Precisely. People will adapt to this stimulus. They will change. That’s why high prices of oil are good for exactly one reason: it encourages positive behavioral change toward efficiency.¹

1. Granted, the fact that it may mean less food for some families suck. This is a consequence and a testimony to the power of economics and proper planning, at both the macro- and microeconomic scale. [↩]