can you find out who views your facebook?

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Yes. Go to Facebook's home page (http://www.facebook.com/) and right click. Select the option "View Source" or similar. If this option doesn't show up, try using a different browser. (Chrome, Firefox, IE7, etc.) Scroll down or hit CTRL + F and type in "friendslist". You will then see a bunch of numbers followed by a -1,
-2, -3, -0, etc. The numbers before the -# correlate to the Facebook ID of one of your friends. For example, if the string looked like:

"100001799198152-3"

You would type in: http://www.facebook.com/100001799198152

The numbers are listed in order of who viewed your Facebook profile most recently.