When someone repeats an argument that has been proven false /badly argued many times before, but keeps repeating it in hopes of drowning out opposition or derailing a thread. Yet not disruptive enough to get banned on forums, as it wraps itself in non-hostile, nicely written sentences.
How exactly do moderators deal with this kind of behaviour?


sealioning ?
Sea lioning is pretending to be interested in a reasonable discussion when you’re really looking to wind someone up until they lose their temper.
Maybe OP was meta-posting
This one I’ve always been wary of. I studied philosophy so I know a bit about arguments and sealioning is unusual because it can only really take place over the internet where someone is asking questions in bad faith and you can’t 100% call them out because you don’t know their identity for sure. Firstly I don’t like the idea that questions can be bad faith - especially seemingly trivial or obvious ones - since that goes against the Socratic method of questioning all your beliefs/shibboleths. Secondly, it is so context dependent that I think it is hard to universalise it like you can do with other fallacies like false dilemma (everyone is either a tequila or a whisky person, etc.)
Actually it’s quite funny, if you take a broad interpretation of sealioning that does not involve the internet, Ancient Athens sentenced Socrates to death for “sealioning” in 400BC lol.
Well, sealions do go barefoot, even in winter.