It would be interesting to see how this hooks into more general theory of subcultures. i.e., if this is the case there are likely proper academic terms for each of these and a body of work on the subject.
Are there any sociologists in the house?
general theory of subcultures
Uuuuuh, shiny!
By what looks like popular demand on the Society for Creative Anachronism thread, I'm linking a three-part account of three roles that supposedly exist within every lasting subculture or "volunteer-dominated" organization. The author has no proper authority at all but has personally observed many subcultures in the wild.
These roles do not represent exclusive personality types as such. A person who serves as Authenticity Cop in one community may theoretically serve as Fun Maven or even Dream Nazi elsewhere.*
Dream Nazis: Supply vision for the group. Brad describes this as inherently promoting a Golden Age myth of a glorious past. Hopefully this reflects the term's origins in the SCA and not any practical necessity.
Authenticity Police: Seek accuracy and nitpick perceived mistakes. You know this one already.
Fun Mavens: Work up a sweat doing free lifting or other labor for the organization, then enjoy 'a few' cold beers with their comrades. (I find it amusing that I took a while to think of the right word at the end there.) Brad argues that in addition to doing all that work, Fun Mavens sustain the organization by recruiting.
*I wonder if Eliezer doesn't wear two hats right here, never mind at the SIAI.