One of the lessons that my second African American Literature teacher drilled into our heads was the importance of reading things that make us uncomfortable. If we shield ourselves from everything that causes us the slightest amount of negative emotions, then we won't know how to deal with those emotions in any real-world circumstance. You can't make your bad feelings go away by avoiding them, because they'll just grow and grow, and when they do come out, it'll be much worse.
Sure, I don't have a problem with the :concerning: content an sich. (I mean I quite liked White Angels as a study of some terribly fucked up people, too.) But it bugs me how some posters seem hellbent on pretending it doesn't exist. :/
And it certainly doesn't mean that we can't point out that yeah, these parts of the story are fucked up. Reading something that makes you uncomfortable doesn't have any point if you don't think about and, if you wish, discuss the parts of it that are uncomfortable.
Plus, doing so is a deliberate act. You make the choice to read something that's uncomfortable and can brace yourself beforehand (which is kind of the point behind content warnings). Stumbling across it while reading a comedy of all things is a different sort of thing, don't you agree?