Danger: Facebook 'Dislike Button' Is Just Another Scam
Of course, you're not gullible enough to actually click on the link, because if you did, you'd end up on a page asking you to 'install' the button. At this point, your internal alarms should go off, because if the dislike button were real, Facebook would've just automatically added it to your profile. If, on the other hand, you go ahead and click through the installation process, you'll have to first grant the app permission to run on your profile. The app will then automatically post the same link and message to your profile, before asking you to fill out a survey in order to complete the installation. Upon filling out the survey, you'll land on a Firefox add-on called FaceMod, which offers something called the "Facebook Dislike Button (the Original)."
At this point, it doesn't seem like the FaceMod add-on has anything to do with this scam, aside from providing a convenient cover for whoever's trying to make a few cents off these surveys. There's also no indication that the add-on is corrupt or malicious -- but it's definitely not official. So if you want to install FaceMod's button, you should probably do so directly from Mozilla's add-on site, and not through some suspicious link you find on your Facebook feed. For our money, though, we'd recommend holding off until an authentic dislike button comes along -- even if it means waiting for a long time. [From: Sophos, via: Mashable]