Five days from now, President Obama and Governor Romney will meet for their second debate at Hofstra University, answering voters' questions in a live town hall forum format. For the last week or so, Google has been promoting a page called "Your Questions for the Candidates," encouraging users to post and vote on potential questions for the moderator to ask. More than 20,000 people have done so, some of them prompted by online advocacy campaigns by various groups. The site announces: "The Commission on Presidential Debates will give a selection of your questions to CNN's Candy Crowley, who will be moderating the debate and asking questions of the two nominees." Unfortunately, this isn't really what is going to happen. A high-level source in CNN's...