The comment section on Yahoo was being manipulated for a while. You would expect that since the same user base visits the website everyday that you would get similar likes and comment ratios on each story. But it's like I would click on one story and there would be a bunch of right leaning comments, all highly upvoted, but then click on another story and the comments would all be left leaning and upvoted. I'm pretty sure Yahoo was hiding certain stories from their right leaning commenters.