business or pleasure

I never know what to think when the patron ahead of me in line to buy groceries looks back, gives me the up and down, then reaches for the divider to place between their food and mine. Even if I was the sketchiest of sketchy grocery buyers, and even if I somehow managed to sneak my groceries into their pile and get them to make my purchase, how would I proceed to retrieve my items? Reach in their bags when they aren't looking? Follow them home and take the groceries from their pantry? Punch them in the face and grab the pineapple juice while the lay writhing on the ground? Sounds like a lot of work no matter how I slice it. Kind of like pineapple. That's why I buy the juice.