During fall rush here (UCLA), all of the girls deactivated their Facebooks (basically, it's deleted, but you can always bring it back). I don't know whether this was required, or whether it was just easier than deleting pictures, changing privacy settings, and "cleaning up" their profiles.
It was really effective, because it was as if girls in sororities didn't even exist! I'm sure it was hard for them to live without Facebook for that time, but they all survived.
