Yes! I never know how to feel about being prompted for a tip when I get carry out. Normally the tip is for table or delivery service. I don't think I should be obligated to compensate someone's wage for running my credit card and handing me a bag.
It is is 100% the case that establishments know customers will feel obligated to tip in any scenario they are prompted.
Hell, how do I even know that such a tip goes to the service staff who are paid less than minimum wage?