Lots of people on Facebook, including myself, use the site as a means for expressing their political views. Many of us probably think it would be a pretty awesome thing to be an elected official and wield real power. But since we aren't in that position, we try to communicate their views to others by putting up occasional witty/informative status updates and so forth.
It looks like Sarah Palin left the governorship of Alaska to become one of us hapless people on Facebook. This is a medium where nobody can make Sarah Palin answer difficult questions like "What newspapers do you read?" Or at least, if you post that on her wall, she can delete it and de-friend you.