Don't encourage a one-sided argument
Something that makes a country great is not having one side shoot down the other and call them a bigot just because they believe something different than you. Promote discussion instead of making things one sided. One of the ways to do this is to not disable comments. Yahoo promotes very liberal viewpoints. If that is your intended audience, then well done. If you actually want to be known in the future as a site that allows for a melting pot of ideas and doesn't push propaganda or what is popular and at least tries not to be biased, maybe you should be more well-rounded.