I refer people to this thread:
http://www.askmehelpdesk.com/feedbac...ure-24951.html
which discusses guidelines on how and when to use the Comments feature. That's what appears to be the focus of the OP.
People can disagree with matters of opinion. That's just part of life and free will. That is always going to go on whenever you have a discussion on opinion. However, if you disagree with a matter of opinion, just add a post to the thread offering your disagreement and an explanation.
IMHO the Disagree choice in the Comments feature should be used
ONLY when pointing out dangerous advice or correcting or factually incorrect answers.
One other point. the choices offered are
I Approve and
I Disapprove. These show up, however as
I Agree and
I Disagree. While these are similar they are not the same.