Earlier quoted context omitted.
> whenever a mod removed something forcibly from front Mods (as far as I know, I'm not one) never forcibly remove things from the front page. These are almost always the result of user flagging.
Those are marked first "flagged" as a warning, and then "dead" when the user flags reach a high enough level. This article however is about stories that disappear without receiving either.
Here's an example of a submission that does not include the [flagged] label, but which has a moderator saying it got flagged, and that the flags are the reason it's not on the front page. https://news.ycombinator.com/item?id=13741276