Facebook Scam Alert

My friends and I were wondering, why there is no dislike feature in facebook, so that we can dislike those very annoying post, posted in walls. When I was watching CNN last night, I was  amazed that there is a scam alert from facebook, that can really catch the attention of many facebook users.. the feature of this scam, the user will have the authority to  dislike a post of the other user. But user needs to enter his/her personal username and password in order to use that feature, Isnt that pretty cleaver?Somehow this is a lesson for us users, that we have to be observant and vigilant when it comes to web privacy specially in social networking.