This customer still hasn't learned proper tipping etiquette . Even after numerous orders from the same pizza place, she still thinks it's cool not to tip the pizza delivery dude. Tipping culture has never been more hotly contested, as more and more places have added tipping options to every order. It's especially awkward when you're buying something at a store or restaurant where you're just being handed an item. If the person behind the counter just rings you up your order, why should you have…