According to me Part 3 of Communities in Cyberspace dealt with online social structure and network. Once a 'structure' has been established, it has to come up with certain norms, rules and regulations; it cannot exist as anarchy. However the dynamics of that structure, it characteristics and rules are completely in the hands of the person(s) who creates it. People who exist in that social network must comply with the rules of the structure.
Hence, the language used in that particular social structure depicts the ‘structure’ with its formal rules and regulations. So, instead if your member of social MUD, whose members’ deal with fantasia, such as The Wizard of Ozz, I doubt you will find such strong language