@j I think it depends on which behavior will be reinforced by caretakers, but especially visitors.
If the microwave parrots are ignored by people visiting the zoo, and everyone reacts and interacts with the swearing parrots (even if it's to say "bad parrot, how could you say such a thing!", it's not like the birds will know they're being reprimanded. Any attention will be positive for them) they you get 100 swearing parrots.