I'm happy for this change because I think one thumbs down would lead to more. For instance, let's say I make what I think is an important (but possibly controversial) comment. It gets 1 or 2 thumbs down then another then another then another just because people like to pile on. Then, because I got 7 thumbs down, maybe I'm angry. And I take it out on the rest of the comment stream by downing every other comment just so we're "even." It happens - I am 100% sure of that.
Now, let's say you want to encourage discussion. What does thumbs down do? It makes everyone yes-men & women. Let's just agree, maybe someone will like my comment. Big whoop. lol I'd rather make the honest critique rather than tell someone what they want to hear. When I first came back to Moz after a few months off, I almost immediately got 5 very quick thumbs down. It was a reminder that the system in place suggested that I was supposed to just agree with everything everyone says.
Let's put it this way - one of the most discussed, necessary posts on Moz last year had more thumbs down than any I've ever seen on Moz. Yet, it was a necessary conversation no matter which side of the debate you fall on. Negative commentary doesn't have to be a bad thing. I think Moz should encourage more posts like Josh B's, not fewer. If people are less "afraid" to post controversial things for fear of being knocked back, that is good for Moz.
