I think that parents telling their children that Santa and The Easter Bunny and Toothfairy, etc is perfectly ok! After all, it’s just a part of being a kid. With that said, you can’t blame parents for someone believing that Slender Man is real. You can’t even compare Santa Claus and Slender Man. If those girls honestly thought that Slender Man is real then they have issues, not the parents. All the parents did was give them a normal childhood, they didn’t try to instill in their brains that every mythical character is real. Those girls are just the pure and utter definition of crazy.