I'll give mine to get the ball rolling.
There was a user that, before getting banned, declared that every single living human being alive on Earth right now should not exist because no one had the benefit of a pre-conception device on hand to somehow determine each individual's consent to exist before they started to exist.
I don't know if that take would make David Benatar blush, make David Benatar cackle with glee, or if that was posted by David Benatar himself.
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This was a moderator and they were also banned for constantly derailing conversations in mod chat, calling for poster unionization (still don’t know what this means), and calling for admin elections (as in server stewardship switching hands). I remember a lot of weirdly passive aggressive behavior in general as well.