The plan (as I understand it) with RVillage was to be a social network that allows RVers to keep track of what others are doing and where they are. If you are a long time RVer, you know that you often run into the same folks as you travel. This was just an effort to make locating RV friends more conveniently.
Yes, it has all the privacy issues of Facebook, MySpace or any other social media, but it was arranged to make geographical information easier to establish.
Matt