Yes, that gave me an idea. Those likes can be used to earn back warning points you lost. Or have both dislike and like button and the more likes you have will prevent you from losing a warning point. And if you have more dislikes then you lose a point.
We have "like" buttons on other forums I go to and we have "mentions," which are basically like twitter, and I think it's great. The threads are clean because we don't have repost over and over.