When the U.S. Congress created the Federal Radio Commission in 1927, what we now call cyberspace was just "ether." Broadcasting had only begun to carry tinny human voices and music across the fields and prairies, while Sunday afternoon phone calls to Aunt Mabel snaked through wires below, courtesy of an army of operators who switched each circuit by hand. It didn't take long, though, for the wires and airwaves to fill up with untrammeled chatter,...