This is for the anon about the plagiarized worked, I truly believe you should let the original writer know that their work is/was being plagiarized. I really think they should have the last say on whether to come forward with this info or not.
Also I think the reason those big accounts never face any real consequences is because all the drama they start is kept in the jjk fandom. So while other fandoms may see/know of the drama they tend to stay out of it since it doesn't involve them directly. But if the work that's being stolen is from a different fandom then this gives the other fandom every right to get involved(as well as other writers in general since plagiarism/stolen work is a serious problem,even more so since AI). All in all I think this big account(& anyone who tries to defend them) can possibly face some serious consequences this time. Or at the very least this makes people wary of them going forward.