I think people that do this are either insecure or have some other major issues that they feel the need to be nasty or negative. Or, they are jealous. I was just walking with a friend of mine and we were talking about some people in real life that we know that do this, and for what? Does it make them feel better? I guess I'll never know. I get the posting to make yourself look good, many people do that and I know that I used to. But, the people that are deliberately nasty... I can't deal!