The Biggest Problem with Facebook

So as you all know, I love facebook.  However, despite its flaws (the high school-esque drama, the time-eating, the potential lack of privacy), I really only have ONE issue with it.   Facebook makes it much more difficult to successfully lie about one's whereabouts.

There are the status updates.  Even if one doesn't update her status on her own, perhaps other people she's with might broadcast where they are and who they are with.  Same thing with the check-ins.  And the chance of someone posting and tagging a picture and tagging it saying 'last night, omg, so much fun!'

Now, I am not one who habitually lies about my whereabouts.  However, there was a point in recent history where I had to tell a white lie.  While I was out doing what I was actually doing, I kept finding myself having urges to update my status and I almost caught myself doing it once or twice.  Additionally, I can think of a friend who was told by another friend that they couldn't hang out because she was too sick, then later, said friend saw a status along the lines of 'out and about in the city'.

Is facebook going to ultimately keep us more honest about our whereabouts?  Or, is it going to expose all the liars?  Does anyone else have a problem with facebook serving as a GPS on us for all of our network?  Your thoughts?