Looking for abusive and controlling groups (and members of) in CA would be like looking for Catholics in Rome: you won't have to search long to find some.
I could spend an hour (at least) telling you about some of the strange groups and people who I have encountered out there.
Probably the most memorable of these was a group calling itself the Temple of Higher Consciousness (T.H.C.). I got the impression (on my visit many years ago) that they were some kind of New Agey cannabis-worshiping cult.
When I met them (in Escondido in 2008) they were having a feast of sorts, and they were slathering potent "cannabutter" all over everything.
Their (ostensible) leader was a middle-aged woman who called herself TES.
Yeah, I'll never forget the T.H.C. group.
Actually, I once wrote of them here:
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forum.culteducation.com]