I've just been having a discussion in comments here where I referred the poster to the help on cross-posting. I've been told that I'm wrong (which, given how often I am wrong, hardly comes as a shock to me), and the help is misinformed.
I'm happy to be educated, but if the help is wrong, or even incomplete (and consequently, the actions of the moderators and some of us ordinary users here thereby misplaced), something really ought to be done about it. At the least we ought to clarify the situation here in meta. So what is the situation?
The nearest relevant meta post here on CV I can locate is this one, but I expect that Michael will tell us that, that, too, is based on the same misinformation. I think Michael ought to have the chance to put his case that I – and anyone else making the same error – have been doing it wrong, because if we have, we should change that. I have invited him over, so that we don't spam the comments in CV, and here in an answer there's plenty of room to make the point, rather than the tiny space in comments. But anyone's take or some pointers to better information is great.