The Watchtower study article for 9/11/2011 says;
"Suppose that a doctor told you to avoid contact with someone who is infected with a contagious, deadly disease," the article reads. "You would know what the doctor means, and you would strictly heed his warning. Well, apostates are 'mentally diseased', and they seek to infect others with their disloyal teachings... Jehovah, the Great Physician, tells us to avoid contact with them. We know what he means, but are we determined to heed his warning in all respects? What is involved in avoiding false teachers? We do not receive them into our homes or greet them. We also refuse to read their literature, watch television programs that feature them, examine their websites, or add our comments to their blogs."
So now all those who do not believe the teachings of the Watchtower are "Mentally Diseased". That is not only preposterous, it makes the writers of the Watchtower seem "Mentally Diseased". They must be getting really desperate.