It seems to me far more likely that they would think about it a tiny amount less, and express their thoughts more constructively, which would be better overall. We will still have far more people pointing out work that needs to be done than people willing to actually do the work.
I am having some trouble seeing my responses to a post after refreshing an article (but they still show up in the right-hand sidebar). Anyone else having this problem? I am using Firefox 16.0.2. Is this a bug or a "feature" (I think some of us are all too aware of the sometimes blurry distinction...)?