Clubbyclub Lets You Create an Exclusive Social Network

Granted that a social networking site has to be freely open for all, there are still some online users who are a bit hesitant to join an online social network due to various fears. Or more specifically, fear of getting attacked in what ever form by strangers. Would a social network made exclusive for you and people you now actually be called a social network? Should a social network be exclusive to a certain group of people? Apparently new web 2.0