By Howard Kurtz, CNN
Editor's note: Howard Kurtz is the host of CNN's "Reliable Sources" and is Newsweek's Washington bureau chief. He is also a contributor to the website Daily Download.
(CNN) - There are things that I admire about Rupert Murdoch. He has maintained a lifelong commitment to newspapers, long after it became clear that they were no longer profitable. He has a feistiness at 81, when he could be happily sitting on a yacht somewhere. He now spews his opinions on that newfangled social network called Twitter, and since he's the undisputed kingpin of News Corp., who's going to stop him?