This is unneedfully obtuse. Double hyphens are a stand-in for em dashes in most contexts.

I think the context here is that em dashes are usually generated verbatim from LLMs? I haven't seen them generate a lot of double hyphens; I suppose the post could be laundering them to double dashes, but if you're gonna try to hide LLM prose just drop them entirely? [please correct me if I'm wrong and double dashes are also an LLM tell - genuinely don't know]

	▲	wolttam 5 hours ago \| parent [-]
		My comment was trying to point on the inanity of calling out "so many em-dashes" on a post where it doesn't seem that obvious it was LLM generated. I added some of my own inanity with my remark about them being double-dashes, even though some people undoubtedly find-and-replace the em-dashes in their LLM-generated content something else to try and make it appear more authentic. But perhaps the best approach would have been to down-vote and move on.