This is a forum, and at a forum its all about the oppinion of other users. So, what if you post a signature you just made, and you want others to give some CC. If you ask them to do that, most people will do that, and you ignore the rest (like: theyre great). In that case, you just have to think: Well, thats not the kind of information I was looking for, but anyway thanks for liking it. There is no need to delete the oppinion of a user, unless its spam. You just dont want others to say 'Theyre Great', but maybe other users do prefer that kind of posts.