I don't know anything about this PSA advising young people to stay away from chat rooms lest the cute boy on the other end turn out to be Cthulhu, waiting to take their sanity, but I certainly support its message.
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.