Why I won't order dairy/produce/meats/frozen food online: while I'm shopping I'll often see a stack of order boxes with perishable and frozen items slowly saunter through the non-perishable isles - either the picker is ignoring the process, or there isn't one!
Plus, I always check to ensure I pickup the longest expiration date possible... pickers I would imagine would do the opposite (i.e. get rid of the store's oldest stock first).