The Facebook posts Palin doesn't want you to see. - By John Dickerson - Slate Magazine

Apparently some people haven’t yet learned that content posted on the Internet tends to stick around, one way or another.  See the link below for more context/details.

The deletions amount to a real-time look at how much effort and care Palin puts into protecting her public image. It's not just the number of posts that are screened out that gives some indication of how seriously Palin's team is monitoring things. The superfine mesh through which posts are sifted also gives an indication of the work involved. You don't get erased just for using vulgarity or pushing spam (which Facebook might remove anyway if flagged). The kinds of posts that are likely to get you removed from the Palin comments section can be divided into categories (the comments have not been edited):

The Facebook posts Palin doesn't want you to see. - By John Dickerson - Slate Magazine