One of the things with the plaza is that there has always been a little opacity between the writer's guidelines and what gets posted. Ultimately, Gromet makes a call on what he thinks is acceptable, and the guide merely expresses his intent.
Another thing with the plaza, is that is has always categorized stories based on very broad genre headings. It's a decision with up sides and down sides.
It has never allowed key-word searches. While I don't think it would be technically that big a deal to add keywords of some kind (but what would I know?), the chore for Gromet, to assign category keywords to existing stories would be overwhelming with all the old stories there are. Perhaps with the new and energetic moderators it might be possible; but that would be up to them, and it would be greedy to ask for it.
Making the existing "story codes" searchable, seems like a purely technical task, but I've always thought that system of story-coding wouldn't help me find stories I wanted. It often fails to say much about the story's key categories and often nothing at all about tone.
It has its root in the old newsgroups, which were tightly genre focused to start with, and were originally intended to differentiate nuances of fairly "vanilla" sex stores. Gromet adds numerous code words of his own, perhaps with an eye to future searchability, but for now you have to open the story to see them, unless it's on the front page.
If you're looking for particular stories, maybe it makes more sense to ask in a genre specific section of the plaza rather than general discussion, but to be fair, the OP wasn't just asking about the plaza.
Personally, I think it's an act of mental gymnastics to have stories coded "n/c" and say that rape stories are against the guidelines. I guess that the intent was to discourage the worst kind of rape glorification stories. Some stories show rape, or molestations that don't happen to involve penetration with a penis, but which are basically worse than rape, but they have an ethical grounding that presents the act as awful, which we could say justifies choosing to show it for "artistic reasons"; the point made is anti-rape. A lot of the time, the reader is asked to identify with the victim, which maybe makes it less bad too - but some may not see that distinction as helpful.
My old story "Betrayal" presents a number of extremely nasty acts, but never gives the impression they are fun, or that the protagonist enjoys them; the clear message is that it's damaging - horribly damaging - and at the end everyone is diminished by the events that took place. It was written as a kind of protest against stories where horrible things happen as pornography. It's not written in a way that is titillating, it's written to provoke disgust.
There are plaza stories that include acts that fuzz between "n/c" and "reluct", or where considerable coercive force is applied, and they vary in ethical grounding, but there is at least some room for doubt, or the bad guys get their comeuppance, or the victims escape, or we learn they were always complicit and weren't really victims. What I mean to say, is that it's at least possible to construct an ethical or artistic apology for those questionable elements.
However, there are a few stories, very few perhaps, that I believe should never have been posted here, and which violate pretty much every writer's guideline (and then some), and in which the villains get away with their actions, and profit from them, and in some (the worst) the victims also ultimately come to accept what is done to them as normal, or forgivable. I do not think such stories are even remotely in accord with the moral tone of the plaza. Some readers will know which stories I am talking about; I'll leave it at that. While I think such stories should be allowed to be seen somewhere, I don't think they are right for the plaza, but it's not my call.
Limiting what is on the plaza is different from believing that censorship is a beneficial approach, or makes the world a better place, or humans better people.
Something the OP raises, perhaps unintentionally, is the ethical quandry surrounding fantasizing about an unethical act, as the victim, and wanting to see stories that portray that. Somebody looking from outside might view those stories as promoting unethical behaviour - extremely unpleasant and illegal behaviour - and view them as the worst kind of pornographic filth: the exact kind of thing they feel must be removed everywhere it appears, destroyed, and erased from human consciousness, (and the creators punished) as if the very ideas themselves can be erased. Such individuals, appointed, or self-appointed, are always on the lookout for examples of what they hate so they can destroy it with fire and brimstone.
It is a dangerous territory, and there are dragons there.
