It's an exorcism, not an endorsement.

Yup. Perfectly phrased.

But I find it's usually the younger, more sheltered crowd who lose their minds and can't believe someone would write something sooooo disgusting! (Though this does not mean there aren't young folk processing their own trauma via fic.) I just look at them at think, "oh honey, you're not far from having your first ship that somebody else finds morally objectionable. Calm down."