You can read a lot of it, including links to pertinent stories and essays HERE.
The issue has taken a very sharp turn from being an abstract thing about individual taste and squicks to a fairly heavy discussion of "triggers" for sexual abuse survivors and others who've suffered trauma and what responsibility for those triggers individual authors have in terms of making their warnings explicit.
The dialogue has sparked individuals on my F-list and elsewhere to share their thoughts on the matter and in some cases just ask more question. I know it's spreading throughout the internet and manifesting itself differently in various fandoms. (There was a discussion in a Who-comm about one specific Rose/Nine fic and what did or did not constitute rape, which I don't think had much to do with the warnings and triggers issue, but which clearly was -ahem- triggered by the posts.) If you see (or write) a post on the matter, feel free to link me, cause I'd like to follow the story as it develops.
I have opinions. For the time being, I'm going to keep them to myself as far as the big, wide fannish world is concerned. I know this sounds unlike me, because I'm pretty outspoken on some issues that are tangential to this discussion. (OWEN IS NOT A RAPIST!)
This is just not a pile that I feel inclined to jump into right now, although I reserve the right to do so at a later time.
I will take the opportunity to re-pimp the omni_fiction community, which does not require specific warnings for any individual squick, kink, activity etc, although it doesn't ban them either. The system is pretty basic: Green/Yellow/Red. If someone clicks a red story, I think they can readily expect it to contain something that somebody might consider disturbing, and make choices accordingly. So if you have written an adult story in ANY FANDOM, and feel it might not be appropriate for your usual fic-coms, but also would prefer not to spell out every detail, please consider joining and posting.