I was in Tesco at the checkout earlier in front of a mother (30s) with double buggy and one toddler sitting on it visible. I was waiting for (very slow) customer in front of me to get her cards out and pay. The very young cashier was clearly extremely bored/nearly asleep (don't blame her) and yawning madly. Suddenly, the mother behind me said to her "Do you have a bin?" - she agreed she did, whereupon the mother handed her a perfectly good banana in one of those thin transparent bags and asked her to put it in the bin. She then said to the cashier, "You look as though you are thinking I should be paying for it but it's free to kids, isn't it?". (She had just opened a pack of oaty bars that she had not yet paid for and handed toddler one so I suppose she thought he wouldn't eat the banana after all). We were all a bit taken aback and I went away wondering why, if she wasn't willing to replace it on the banana shelf herself, she didn't just apologise and ask cashier if she could leave it there for a member of staff to put back. In effect, she was throwing away perfectly good Tesco stock that she had decided not to have and hadn't paid for. AIBU?