By a monkey......
Yep, grinding AV gettin close to exalted on my 11th AV battle, i got raped by a hunter and his dang monkey, who flung poop at me.
Who ever the person was at blizz that decided to say one day:
Dev 1: You know what we need for cata guys?
Dev 2: No what? what do we need?
Dev 1: Monkeys!
Dev 3: Monkeys? Why monkeys for?
Dev 1: Think about it, We give hunters the chance to tame a monkey, that will be lolable, but serious at the same time!
Dev 2: Ok, what would be its specail ability?
Dev 1: Poop Slinging! Think of the carnage that would be going on!
And thus how monkeys came into play! well so i think
Good times, good times