Rules of Speaking Community in Korea

Rules of speaking community distinguish eligible member in community

‘Cyworld’ is the name of Korean Social networking website. This website is made before Facebook became so popular around the world. These two sites share common similarities; finding friends, uploading pictures, and sharing information via website. It is interesting that Facebook faces and causes many problems related to privacy. Exposure of personal information, stalking on particular person, and diffusion of rumors are common examples of negative results from Facebook and cyworld. Cyworld mostly has solved these privacy related problems within past few years, but ironically, it has lost many members because people also want or have tendency to do problematic behaviors above. So, most of cyworld users (I expect many Facebook users will follow in near future) now do not use their private page, but they join specific cyworld communities that are made by friends, people who share specific hobbies, regions, school, religion, ideology, etc. The process of subdivision leads people making their own communities that I can find particular speech communities so easy in Cyworld rather than Facebook.
People who share something similar make communities. Each member tries to find their own identity and fellowship from other members. It is difficult to be a new member in existing communities. In community, they share personal information, so they look for qualified or trustworthy people, and sometimes it functions as protection of community’s privacy from outsiders. To figure out who is qualified or eligible to become a new member of particular community, existing members ask new members to share new rules of speaking system.  
First community I joined seven years ago Serieamania. This community was for Korean soccer fans that were interested in Italy soccer. When this community was made, only five including myself knew each other in offline. We uploaded pictures, found Italian friends in Facebook, and...