The reply to that message notes that the email doesn't read like previous emails he's sent, and the Github account mentioned was created an hour prior to the email being sent. I think it's at least somewhat feasible that it's still the LLM writing, and the acronym is just something it made up.
and the poor Fedora teams will continue to assume good faith and continue to engage with this person... all because, what, they were active on a bug tracker for a few months 5 years ago?
They won't put their foot down until the AI starts spewing hate speech, probably.