how does a plastic bag ban confuse shoppers?
i mean, i can see how it'd be more expensive, or why the grocery stores wouldn't want the ban, but confusing shoppers?

I can easily imagine the confusion:  each time I shop with my cloth bags, I see and hear confusion from fellow shoppers and the people at checkout.  "Oh, you want me to use that to put your stuff in... why?" "What's wrong with plastic?" And I say that I don't like plastic, it's not good for the environment, etc.  And too often I hear that "I never heard that before."  But, sometimes, I hear, "I feel the same way."  And we smile at each other. [Of course, I smile either way!]