"Dead Dove: Do Not Eat is a warning or tag used to indicate that a fanwork contains tropes or elements that may be deemed morally reprehensible without explicitly condemning the sensitive aspects."
i don't think it really fits Arches and Echo, what you described wouldn't fall into the "horror" tag? also is there even a Dead Dove: Do Not Eat tag in this site?
I mean, here's one of the writers justifying why they just HAD to bring back Brian the Rapist Methbear... a really gross polarizing character who seems to exist solely to be shockingly EEeeeEEEeevil but in ways that are super murky about whether The Great Evil Thing lurking nearby makes him that way or just made it easier for his already inherent evil to break through any charades of decency.
the point i was making is that your definition of Dead Dove :Do Not Eat is not the commonly accepted one, if Arches had this tag most people will assume that the story portrays immoral behavior without condoning it, and for as polarizing as Brian is, you can't deny that the narrative explicitly condemns his actions (also evil in murky ways? the post you link straight up calls his actions sick), what you seem to be wanting are better/more detailed content/trigger warnings
