Oh, they're here, they've always been here.
It's just that because of guys like us, who flock to them like moths to an open flame, they prefer to stay hidden, or, incognito, if you will. Some of them, though, are like your typical Myspace/Facebook/other social networking site whores, but fortunately, they are eventually flushed out and return to their spawn pool.
It's a good thing most of the ones here are quite smart, as well.