Eighty-seven million Americans watched the first debate between presidential candidates Barack Obama and Mitt Romney. You’d have thought Honey Boo Boo was going to appear on “Dancing With the Stars.” We’d have learned more, however, if the two candidates had appeared on “Are You Smarter Than a 5th Grader?” The first thing the moderator does in a modern debate is tell the TV audience that the live audience has been instructed not to clap or cheer for one candidate or the other. So the obvious question is — why is there a live audience? The real audience is that gigantic …