See username; I work in retail.
Most of my job on the shop floor is restocking and cleaning, so I see this quite a lot (pretty much every shift).
Customer picks up eg a chicken, walks around with it for a bit. Decided they no longer want it, leaves it in random aisle. If it's a fridge, that's not so bad though annoying. But if they've left it in say, the canned foods aisle, or the DVD aisle, then it will have to be thrown out because we don't know how long it's been sitting there when we come across it. Just this week I've thrown out...
2 packets of bacon, 3 packets of sausages, a whole chicken, 2 packets of chicken breasts, a kilo of frozen prawns, 4 salmon fillets and a bag of frozen nuggets. None of which are safe to sell if they've been sitting out for god knows how long.
It's a crying shame to waste this food and it also effects profits and as such, can effect staff, as large or frequent losses can mean they cut back on staff. Which may mean a loss or reduction of hours or extra staff not being hired for special events (like Christmas) and the existing team particularly salaried staff being worked to the bone because it's cheaper than hiring a temp. Losses like this directly contribute to that.
Aibu to ask you as a customer to NOT bloody do this?!