If, like me you get tired of seeing an activity feed that is full of "profile blah viewed by guest" type messages, the fix is very easy.

Edit modules/boonex/spy/BxSpyProfilesActivity.php

Look for the following code

case 'view' :
if($iSenderId != $iRecipientId) {                    

Replace it with

case 'view' :
if($iSenderId != $iRecipientId && $iSenderId != 0) {

That's it!!

Enjoy.

/DM