Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-845740-20130819130916/@comment-6383956-20140914024134

Jeff said on one of his Tumblr Q&As that they would never do vampires. I think that's a legitimate choice, but, of course, we know Jeff can always change his mind on that.

That said, there's no reason we can't just imagine vampires exist they just never cross paths with Scott and his friends. Or, they do, between seasons, and the events are just so inconsequential that they're never mentioned. (Like, vampires aren't that hard to kill, y'know what I'm saying? Stake through the heart and all that jazz? :P)