Players have been doing the math on the notorious Hemet Nesingwary (murderer of animals everywhere), and on the forums, Stubblez has figured out that if you follow all of Nesingwary's beast-killing instructions to the letter, you're responsible for murdering 278 of Azeroth and Outland's fauna. Of course, most players kill even more than that (and there are other quests that ask you to kill even more animals), but even if you take those total numbers and multiply them by the 10 million players Blizzard claims, you get two billion, seven hundred and eighty million animals, all slaughtered in the name of Nesingwary. And that doesn't even count alts.
Fortunately, as Neroblanc notes, all that killing hasn't actually thinned the Azerothian animal population at all -- if anything, the beasts in Stranglethorn Vale are herding thicker than they used to be. We'll have to nuke them from orbit just to get rid of all those Raptors down there.
But that, of course, doesn't keep the hippie animal lovers from fighting back -- as you might know by now, in the expansion Nesingwary is going to face some opposition in the form of D.E.H.T.A., or Druids for the Ethical and Humane Treatment of Animals. We have a feeling that Hemet's impeccable taste in leather and animal-skin based wear, not to mention his classic novel, probably won't be too much protection against the do-gooders.