FaceBook - Use caution in installing applications
QUOTE: We often have readers ask us questions about specific Facebook applications. Some apps generate an enormous amount of spam and can annoy your Facebook friends. Others are outright scams and should be avoided entirely. For example, any application offering to show you who has viewed your profile, who your Facebook stalkers are etc., are guaranteed to be fraudulent. Facebook doesn’t allow developers access to the data required to create apps like this.