I'm not paranoid. Checkout charity is not a new thing and its dynamics are well known. There is awareness in the retail industry that there are a few elementary dos and donts that can prevent shoppers (or paranoids like me) from feeling trapped and pressured. Safeway and Walgreens both prompt shoppers discreetly on the credit card terminal screen and that's all good. The reason WF does it this way seems very obvious to me.