It is obvious that Yahoo is attempting to censor opinions that they don't agree with. Such action is reprehensible. You should be ashamed. Democracy can only function when the electorate has all the facts. There are always two sides to a story. Censoring half the stories is basically a half-truth. That is, a lie! I would define an unethical act as trading a short-term gain for a long-term loss. You should be careful that your behavior doesn't ultimately result in a complete loss of faith in the Media, and thus you become irrelevant. Good luck!