My work gets deleted because it's considered "pornographic".
Have you ever seen those deviantart pages where every picture is of someone's own penis in all kinds of strange lighting, and you know the page is devoted to nothing but the person's own desire to exhibit his genitals to the world? Why don't they ever get deleted? But then a tasteful picture of faux-sex between a guy and two other versions of himself (part of a series) gets deleted from my page because someone got bashful while viewing a picture labelled as having very mature content.
I've flagged pictures before, admittedly, but only for really blatant un-artistic exhibitionist