"rps" wrote in message
You're right that the newsgroups are public fora. However, when they
were started, people were supposed to abide by each newsgroup's
charter, though there would be no one to police such activity except
each forum's own contributors. The charters for the rec.aviation
newsgroups can be found at
http://www.faqs.org/faqs/aviation/faq/preamble.html.

The way I read it is he should start a moderated version.
rec.aviation.corncobupmyass.piloting.moderated.
I wonder how many members would contribute to that. He could have his own
exclusive members.