This thread kinda went off on a tangent, but the main point I think we should take away from this article is that it is worth it to privately explain to users who post content against the guidelines why their own stuff is getting removed. The study indicated that the more detail provided, the better.
So, concretely, if somebody’s content is removed because N people flagged them, I believe right now the automated message to the user says “your post was removed because N people flagged you;” the message provides no information about why the post may have violated community guidelines.
That’s just an example. I feel like the overall gist is: removals should be associated with reasons that the post was removed, reasons that the user could act upon to change/fix the post, even (especially) if they’re just canned explanations selected from a drop down.