If they’re moldy, they’re nearing the past due date of their shelf life. You doing it at home after they’ve been in your fridge is nowhere near the same thing as buying what is marketed as fresh. If it’s been sitting out long enough to grow mold, it should be clearly marked as such and the price discounted. Think day-old bread, it’s not fresh but it’s marked as such and the price is reduced - the buyer is aware.