That's all true, but putting "humour warnings" kinds defeats the purpose, and converts what would be dry humour into something more akin to slapstick, a bit like that person we all know who always insists on going "Bah-doom, Tsh!" on every mildly funny aside. When someone else highlights things that that I no longer find them funny at all, so I'd be reluctant to do it.

I appreciate the feedback ... I think the best thing for me is just not to try again, and to be explicit when I know something is a joke, and clear that I'm adding factual information.

Watching people continue to downvote the comments I've made, HN is clearly the wrong place for me to do otherwise.