If you get grapes that are sour, you can return them to the store and get your money back. Eating anything that you didn’t pay for is stealing.
Right, right, I’m going to drive back to the store and burn $5 in fuel to recover $3 in grapes?
Moronic.
I’ll sample a single grape and make sure they are good. You feel free chase me down in the parking lot for it. We will see how that turns out.