I read the blue post and it sounded like he thought if you posted here you could talk directly to the people doing it. I don’t know. He did say to post here so you are right in that.
He also said that they don’t intend to restrict the characters who post on forums so that’s your answer.
The trolling is annoying in general but it doesn’t matter what character posts it. If it’s really bad you can report. In general I just assume that every new character I see could very well be someone I’ve talked to in the past who wants to either hide or just post on a different character for whatever reason.