An unidentified person -- possibly an art student, based on the title -- has come up with a pretty seriously worded note to other people in the computer lab in order to remain uninterrupted while working on a deadline.
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.