Here's a miraculous Radio Police Automaton from the May, 1924 issue of Hugo Gernsback's Science and Invention. It will be useful for dispersing mobs, and for war. Note the built-in tear-gas tank. Also the "loud-speaker used to shout orders to the mob." Mr Gernsback notes, "They will be well-nigh irresistible."
There's something decidedly pre-Ewok about this design and the bold claims of irresistibility.
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.