Is this a real facebook "dislike" button?

[Noah Toxic]

alright. confused here. So just now on facebook, my friend and one of her friends that i don't know sent me a request to "enable dislike button" in the apps section of facebook. this is the link to the app page:
https://apps.facebook.com/daudwbu/?fb_so...pp_request
At first of COURSE i thought it was a scam [due to there being so many of this same 'new feature'] and i assumed they had bought the lie and got a virus which forced them to spam others... well, after posting about my skepticism, my friend's friend tried to convince me it had actually worked and pointed out that both he and my friend had 'disliked' my status.
It still seems pretty illegitimate to me.

So, is this an actual facebook dislike button or are they just falling for something stupid all over again?