Ask HN: Why are Yahoo comments sections overrun by seemingly unhinged people?

I take about 100% of the stuff I read on Yahoo! with a grain of salt, as most should. That being said, when there is anything of interest to click on, the one place you can guarantee to be morbidly entertained and disappointed with society at the same time is the comments sections. I have my suspicions of the possible types of people that still have Yahoo! usernames, that make the effort to leave comments, but my question to this community is, who are these people?