Ugh ... another Monday ... another Facebook scam. This latest threat is a 'dislike' button. The major red flag for this is Facebook hasn't even released a dislike button yet. If you see the link “I just got the Dislike button, so now I can dislike all of your dumb posts lol!!” or “Get the official DISLIKE button now” followed by a link, do not click on it. It's just another scam that tries to extract your personal information.
You can read more at Mashable