Upvoted, but FYI, it's really hard for people to know whether or not that sort of thing is humor or malice - I was actually trying to guess that (thinking that it would be funny/rational as humor/look-into-the-dark), and ended up leaning toward malice by prior probability (guess I should have realized prior frequencies are skewed on this particular website, but I'd been reading older OBLW posts and looking at the lower-quality comments there, that may have skewed my intuitive estimate).

You've got to go further over the top to make it clear that it's humor - talk about my gasping dying breath, "If only... I'd been.. less... overconfident" or something like that. (Actually, even that might not be over-the-top enough. "If only I'd been... less confident... about my own relative meta-rationality..." would do it, that tells everyone you're an insider.)