Twice I ran into this site and read an article I was interested in. I spent a great deal of time researching and tried to post a few polite and relevant comments. They were never posted. I noticed that among comments for these articles there was not a single dissenting viewpoint from the author of the piece. Out of 100's! Apart from that, 98% of the comments were merely "name-calling" or ad hominem attacks, almost nothing of any substance. My comments had a great deal of substance. Apparently, you need to be both vulgar and to see the world with blinders on in order to leave a comment.