Re: You are wrong on "cannot distinguish users"... You never had a parrot then?
my grandfather spent two months with us while dying of lung cancer and the bird adding his cough to the medley.
Parrot intelligence is similar to cat intelligence in its disdain for other lifeforms - except that the parrot is also both smarter and more devious than the cat. The parrot beak is basically engineered for removing keys from remotes and keyboards.
Thus the parrot is the more effective evil, amongst pets.