Does it support killfiling based upon the Message-ID: and References: header?
If yes, you add a rule killfiling on the message id of the post starting the subthread you want to remove, and any article with that message ID in the References: header gets filtered away.
The android app Newsgroups, filters the entire thread. I didn't expect that , but it does cut down on the noise. This is the free version.
Cheers
Dumber than a lump of coal...
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