I've not read the thread, for which I apologise, but for me this has nothing whatever to do with this person being trans. I coulnd't give less of a shit about that in this instance.
For me, this is purely and simply about a person who encourages children and young people to enter into private dialogues with them and to keep those dialogues secret from their responsible adults. It's about the levels of racism, homophobia and misogyny displayed by the person over a long period of time, and their complete lack of remorse about those comments.
This is absolutely NOT a trans issue, it's about the best known charity for children in the country proposing to use, as an ambassador for their name, a person who is wholly unsuitable for the role.
The porn aspect is also worrying, and had I been aware of the other ambassadors for that charity who had been involved in it, I would have spoken out about that as well.