FACEBOOK WEBSITE NEEDS A DISLIKE BUTTON !

This petition must me signed by all facebook members because every day you find a motive to dislike something and don't have a tool in the website for that. The world is not 100% likeable, there must be some dislikes on it. Maybe facebook.com's boss dreams about a perrrfect world, that doesn't exist in fact ! I think this is a normal request, that everybody thinks about, so we fb users need pro and contra actions, it's just a "must be" situation.