Here's a gallery of people dressed as Krampus, the horrific anti-Santa-Claus who is traditional in Alpine mythology. Sez Wikipedia: "According to legend, Krampus accompanies St. Nicholas during the Christmas season, warning and punishing bad children, in contrast to St. Nicholas, who gives gifts to good children."
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.