Remember that student I have who lost her fiance, but decided to stay in the class anyway? Well, she turned in one of those terrible papers with no research and no evidence from the text at all. I gave her a D+, which was kind, actually, but I told her that she needs to do better than that on the final paper or she will not pass the class. I felt awful asking her to do more, but she was the one who insisted on staying in the class, against everyone's advice.
And the other student with sickle cell anemia? No paper at all. Sigh.