Undecided Voters or Just Plain Liars?

Last night at the "Town Hall Debate" in Nashville there was an audience of 300 "undecided" voters. I don't believe it. I doubt if there are three hundred people in the US who have not decided one way or the other. If there is someone who has not made their decision after this the longest election campaign in history with two more clearly delineated candidates, so polar opposite on so many issues, that person should not be allowed to vote. For clearly they will choose at the last minute by throwing a dart or flipping a coin and there is no room in the voting booth for either of those activities.