"Slender Man" is a modern Folklore if you will. For those who have kids you know of him. The creeps who offer you candy from a black car are always slender, or fat and bald, but hey, it's fiction.
The paranormal websites that inspired the girls is "Creepypasta."
An administrator of the website posted a lengthy statement Tuesday, saying they do not condone violence.
"I think that most of you will understand when I say it's hard to justify pinning blame on an entire genre of writing," the admin, who didn't sign the post, wrote.
"Unless you're okay with blaming the world's ills on Stephen King or H.P. Lovecraft, I don't believe that it makes sense to say paranormal writing or an interest in the macabre should be blamed or even used as an indicator of a "sick" person (as a few emails have already felt the need to call both myself and all the authors here). The human race has long held and encouraged a fascination with things that go bump in the night."