You know I'm not a fan of "buttsecks" as a warning regardless of the intent. I mean unless you're writing a parody the word signals a whopping no to me anyway.
That and I really really hate when people post links to fics where you've got to go all out of your way to read it. A cut is good, but like nine clicks is excessive. Not to mention that its pretty nervy to post a link that's f-lock. Seems like a ploy to gain friends and interwebz status to me.
I've just noticed and maybe I'm misunderstanding the warning but how does a dark themed story seem con(ish)? That's got to be a really odd combo.