Recently there have been some discussions which have deteriorated into arguments and mudslinging contests where the use of the disagree button has been used as a weapon. I see no benefit in this button, it only causes aggravation and disharmony. If people disagree, then let them write that in a post, but don't let them just lazily click disagree because they have taken a dislike to someone.
I think the fact that people can see who has flagged them for abuse, spam etc is also a cause of aggravation. It doesn't seem to be used as much as the disagree button, but I have seen people react very strongly to being flagged even when the flag was fair. Other forums don't allow people to see who flagged them, it is left for only the moderators to see and take action on. If you can remove the ability for people to see who flagged them then please so, as I think this will also remove a way for people to weaponise the forum features.