Is slender man and Marble Hornets real?

I'm not really afraid of slender man i'm more fanscinated with him. I would like to know if he is real. According to the Marble Hornets entries he is but i dont know if that is fake. The way they make the videos it looks real also they still put videos on it though that still happens to them everyday. Also in Marble Hornets some of the things looked put on like the scene with Jessica and Jay. So is slender man real and is Marble Hornets real