to add features such as a "Like" button aside the "quote" button so people can react to a post by liking it or disliking it and not necessary commenting
There is no need for a "like" or "dislike" button, if you like a post,and you've got Smerits,you merit(like/appreciate)such posts,and if you do not have Smerits,another user/source may also merit such posts(If the post is worth it)
Definitely if you disagree(not necessarily dislike) with a post,the most sensible things to do is to air(comment)your views on why you think the OP got it all wrong.. It's basically that easy