The real NYC pizza war: http://kottke.org/11/04/the-mafia-and-nyc-pizza-cheese

Al Capone -- who owned a string of dairy farms near Fond Du Lac, Wisconsin -- forced New York pizzerias to use his rubbery mob cheese, so different from the real mozzarella [...] this is why John's Pizzeria on Bleecker Street still has the warning "No Slices" on its awning today.