EditorialGuy - 1:13 am on Nov 15, 2013 (gmt 0)
Google's founders (and people like Matt Cutts) have been around long enough to remember how trolls and spammers contributed to the demise of UseNet. Encouraging people to use their real names--and verified IDs--helps to make the Web a "clean, well-lighted place" and leads to higher-quality discussions.
Something to consider: On many blogs and other sites that use commenting platforms such as Disqus, the comments often exceed the original posts or articles in total word count. I can easily imagine a scenario where Google could use "comment quality scores" as a tie-breaker when calculating rankings. After all, if there are two similar blog posts about the same thing (such as Matt Cutts's newest video), why not highlight the post that includes comments by real people, rather than the one that's accompanied by comments from anonymous trolls?