"Helpful" Tutorials

Should you want to write a fan fiction on Harry Potter but have no idea how to start, there is a helpful list of tutorials at this website: http://www.harrypotterfanfiction.com/viewuser.php?showuid=25357. One example of the tutorials (which are admittably a bit strange) centres around how to go about incorporating sexual assault, child abuse and spousal abuse into your writing. Of course, these subjects are not directly allowed to be used. What is permitted is allusions to the events. Other tutorials include "Mature rape reference tutorial" and "Mature Cutting scene tutorial". This begs the question, is fan fiction going too far? Taking the basic concepts of Harry Potter and infiltrating the innocence with sex, rape, abuse, and profanity is a bit absurd. Even in the name of creativity.