I ordered a small cheese pizza from a local non-chain pizza/sub shop. When I got it home I took one bite and spit it out. I called the place and told them there was something seriously wrong with their pizza.
Their response? Oh, we ran out of mozzarella cheese so we used american cheese instead.
OK. Maybe (and I'm really giving them the benefit of the doubt here) in some small, obscure corner of the world american cheese is used for pizza (I doubt it!). Even so, considering that every pizza place in the town, in the county, in the state and (dare I say) in the country uses mozzarella cheese (maybe with other cheese added but mozzarella as a base at least) do you think it might have made sense to let the person ordering the pizza know you were out of mozzarella and were going to "experiment" a little bit.
If any of you ever have the opportunity to try a pizza made with only american cheese let me give you a piece of advice...don't!