If the link: "Facebook now has a dislike button! Click 'Enable Dislike Button'," or "Download the official DISLIKE button now," appears on your Facebook Wall or Timeline, please do not click on it or share it with others. This is a scam, which will give scammers the ability to access your profile, post spam to your Facebook Wall or Timeline, and redirect you to malicious websites where you will be asked to download and install malicious software or computer programs.
Currently, Facebook has a 'Like' button but NOT a "Dislike" button. The "Dislike" button scam has been around since August 2010, but is still spreading on Facebook because Facebook users are anxiously awaiting a "Dislike" button. Facebook said they may have a "Dislike" button soon, so until then, ignore any instructions to download and install a "Dislike" button until Facebook has officially released the button.
But, if you have given this scam access to your Facbook acount or profile, please remove it. Click here to remove any malicious Facebook apps from your Facebook account or profile, and click here to remove any malicious programs that you may have unknowingly installed.
Also, click here for instructions on how to restrict a Facebook application from accessing your profile and information.