For the time being facebook has not developed a Dislike button.
Be ware from this. This is a scam and spreading very fast. If you remember “Osama killing video” this scam is similar to it. Do not click on “Enable Dislike button”. After you complete its steps you will send this same scam post on each friend’s wall. That’s how it grows.
Defiantly scammers have information’s about people who are going through this. Therefore you don’t click on “Enable Dislike button”