Facebook users have been plagued by scam messages claiming that they can find out who has been viewing their profiles.

Typically, the messages claim that you need to click a link and then install a Facebook app to access a list of people who have viewed your profile. After you have installed the rogue app - which will spam all of your friends with more scam messages - you will be told that you must complete a survey before you can see the list.

As described in more detail in the Facebook Survey Scams Knowledge Guide ( http://www.hoax-slayer.com/what-is-a-survey-scam.shtml ), the suspect survey pages will attempt to trick you into divulging your personal information or signing up for expensive SMS services.