i dont have a FB, twitter, or involve myself in any other "social" app similar to those. I never did agree with the whole FB thing. Now does a perspective employer have the right to your password to check up on you?!? hellz no !! I've heard of this being done and personally i feel what you do on your OWN time should not reflect how the employer views you or your work ethic while employed with that company IF your doing your job as you should be. But unfortunately, this is what this world is coming to.
Now, on another note -- this FB could go a different route, reason being depending on WHO is emplyoing you. ie. fbi, cia, government etc. At that point then hiding a FB would be pointless, lol. They're gonna find out any and all dirt on you regardless--and if you have nothing to hide then you have nothing to worry about.
thats my take on the whole sitch. overall i don't agree with giving out the pw for your personal fb. period.