I know of the feature on Facepunch Forums. XenForo even has an addon for it, but I'm still not sure whether or not I'll add it. Furthermore I don't know what effects it might have in relation to our other addons as well, so I'm not certain if it's even possible to add yet. https://xenforo.com/community/resources/post-ratings-taking-likes-to-the-next-level.410/
I personally think that a dislike button would be pointless when you can just scroll past something you don't happen to like. It's that easy. :3
Also rather pointless. :3wha tabout a HATE button? Be usin that on a certain person fweheheheh