Facebook announced yesterday that it will begin validating the amount of "Likes" on Pages on the social network. The move is an attempt to remove fake Likes, paid-for likes, and malware, and should affect less than 1% of Likes on Pages.
On average, less than 1% of Likes on any given Page will be removed, providing they and their affiliates have been abiding by our terms. These newly improved automated efforts will remove those Likes gained by malware, compromised accounts, deceived users, or purchased bulk Likes. While we have always had dedicated protections against each of these threats on Facebook, these improved systems have been specifically configured to identify and take action against suspicious Likes.