Just go look it up! writes:

How about complaining to it's ISP for violating the charter of the
rec.aviation groups where it doesn't fly ror have any intent to - go
back to the sim groups where it belongs.

ISPs have to deal with one person complaining about another all day long.
About 99.99% of those complaints go into the wastebasket. There's no
requirement to obey any charter (which hasn't been violated, anyway). There
is no violation of TOS. And often the ISP isn't even providing the newsgroup
service (lots of people here use Google, alas! or some other dedicated
newsgroup service).