I think one advantage of FB comments is that it supposedly cuts down on trolls, spam, and stupid arguments.
> Now the downsides, which are probably determinative for us. First, quite simply a lot of people don’t trust Facebook for reasons that range from quite reasonable to totally paranoid. Second, and more significant in my mind, is that many people don’t want to bring their true identities into the comments section of a political site. [...]
> For those two reasons, especially the second, we’re probably never going to do this.
It's like "yeah we know people probably won't like it, but fuck them."
Would you post an "At my job we use technology X..." comment with your real name? You could easily get fired for breaking NDA even if you don't expose anything critical at all.