Do you have a link to that, per chance? It seems like reasonable behavior on their part, but I've never seen it in the site guidelines, nor mentioned in a comment.
I'll check - it may have been mentioned to me separately when I was talking with the moderators about other things ... stand by.
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Back again. I've gone searching and I can't find a comment here on HN via the search function, so I suspect it was a comment made to me by one of the moderators.
I have edited my initial comment to make that clearer.
I have edited my initial comment to make that clearer.