diberry - 8:58 pm on Jun 25, 2013 (gmt 0)
I think Google need to completely devalue all blog comments from their algorithm and treat them a no-follow.
The neg-SEO people would just find another way.
I'm with Hitchhiker - it cannot be coming as a shock to Google that the effectiveness of links as a measure of a page's value is coming to an end. But what else can they use? They need something they can reliably access on every single page (that hasn't blocked their bot), and that can be interpreted consistently and meaningfully.
Then again, links haven't been that for a while now and it can't get a lot worse.