it allows for quick identification of the loser in the group. Seems like every time someone is taking pizza orders for a large group some dweeby kid lisps out that they want Hawaiian. Said dweeb then takes one slice of Hawaiian and six slices of pepperoni, leaving leftover Hawaiian pizza and not enough real pizza.

I've never bought a Hawaiian pizza I like. OTOH, I make a really good Hawaiian pizza - American bacon, thick cut Canadian bacon, red onions, grilled pineapple (grilling the pineapple is the key), and fresh basil. That's a good pizza.