https://news.ycombinator.com/item?id=46221729 sounds like cross-examining to me.

https://news.ycombinator.com/item?id=46221631 is not flagged. That might be because we'd already turned off flags on it (I can't remember).

https://news.ycombinator.com/item?id=46221972 I agree should not be flagged and I've unflagged it.