[c&p] The latest scam targeted at Facebook users hit the public today. The rogue app, which comes in many variants of "Who is checking your profile?", has improved its technique beyond the previous attacks we've seen. Rather than spreading a single app that Facebook can easily block, it tricks users into propagating the exploit by creating a brand new Facebook application that hands over the controls to the bad guys.
Can I know who’s viewing my profile or how often it’s being viewed?
Facebook currently does not provide an application that allows users to track profile views or statistics on the views of any specific user content. Third party developers, however, may offer applications that provide some of this functionality. Please keep a few things in mind for these applications:
Applications CANNOT track profile visits for users who simply go to another person's profile; Facebook has made this technically impossible.
In order to be tracked by an application, you will need to specifically agree to allow the application to track your actions.
Adding an application that provides this functionality is purely optional. If you do not want to participate, please do not add the application to your account.
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Este tema está bastante claro:
Can I know who’s viewing my profile or how often it’s being viewed?
Facebook currently does not provide an application that allows users to track profile views or statistics on the views of any specific user content. Third party developers, however, may offer applications that provide some of this functionality. Please keep a few things in mind for these applications:
Applications CANNOT track profile visits for users who simply go to another person's profile; Facebook has made this technically impossible.
In order to be tracked by an application, you will need to specifically agree to allow the application to track your actions.
Adding an application that provides this functionality is purely optional. If you do not want to participate, please do not add the application to your account.
http://www.facebook.com/help/?page=839#!/help/?faq=12903
Aun así, siempre habrá gente que pique.