We once met a system medicalist offline, she was very angry at us for bringing up anything but DID etc systems as she seemed to have a lot of trauma and thus investment in only medicalised pluraity being the only types of valid plurality.
Thankfully we haven't really met any online.
We didn't reveal we are plural to her, thankfully, but it did force us to come out to a friend about it, so we could explain that we did, in fact, know what we were talking about as apparently the system medicalist then ranted about it on facebook.
She was also a transmedicalist and wanted stronger gatekeeping too, but because of trauma as well, ugh.
We are glad we never really ran into that plural group again as she wasn't that nice of a person in general.