there are two sides to a dislike button.
the positive is that we can simply let the post maker know we dislike/disagree with them..because sometimes post makers get hyper when someone quotes and disagrees with them. :| and then it leads to a war of words and personal attacts.
the negative is that.. if newbies post something and people keep hitting the dislike they will get discouraged to post further and maybe *cough* if we abuse the 'dislike button' like the 'like button' there might be another mass ban for merely clicking it :P
anyway I go for neutral in this. 😆