I don't have money nor time to get really into SCA stuff. We have several groups and types of historic societies in here, not just SCA (some are into vikings & Finland in iron age), but many of the other groups whine SCA has too romaticed image of history and that they don't do things authentically enough. Everything is measured based on how AUTHENTIC it is. They all take things too seriously. That's the same problem I have with kinky communities: small inwards turned circle of fantical people who use tons of money and fight among themselves about how to run their little society or social schism after people have found a partner in that group, split up, found a new one.. and eventually everybody have something nasty to say about each other.
I still belong to rpg convention organiser group & university's rpg association, but otherwise I have gotten enough of it for now.