Haven't heard the term for a while, but a while back Glinner was making the point that these are "central outliers". From that 2020 piece:
While I have much sympathy for ‘Aimee’ Challenor as a clear victim of grooming from a very young age, I also see him as one of the best examples of what I call ‘central outliers’, those individuals within trans rights activism we are told are figments of our imagination, or so rare as to be almost irrelevant, and yet can be found again and again, often in positions where they hold far too much influence.
Challenor’s story is disturbing, strange and sad, but then so were the stories of Eric Joyce, Jess Bradley, The NSPCC, and Morgan Page
Eric Joyce mocked safeguarding concerns even as he embodied the need for safeguarding. The NUS promised an investigation into Jess Bradley and then just sort of, uhm, forgot about it. The NSPCC blocked anyone who complained about their handling of the James Makings/Monroe Bergdorf scandal. The man behind ‘Overcoming The Cotton Ceiling’ is a Stonewall ‘leader’.