Oooooh juicy comment, this makes me want to open a discussion on the concept of race in D&D and similar fantasy sci-fi settings. Personally, I love me some racism and sexism in my campaigns. It's like, you know, your players fight against those things. Which is cool.
I'd love to open a thread, but I wonder 1) if the mods allow it; 2) if the subject hasn't already been beaten to death here.
EDIT: wait, on closer look, you -are- already discussing the very same stuff in this very same thread.
I'd like to add my two cents. I've always loved controversial content. I think showing it is fighting it. You know the old tropes of how the villain "must not be named" but the heroes actually are not afraid to mention their true name and that makes the heroes stronger, because not saying the villain's name makes the villain stronger? That. It's exactly that. Show racism, show sexism, show the bad stuff, because to know it is to be able to fight it.
Hopefully I don't need to add that me adding violence or racism or even implied rape backstories does not mean I'm doing it WITHOUT the consent of my players first. That's a given. But I think that, unless someone is disturbed by a subject, anything is fair game even in a tabletop rpg setting. It's not the subject, it's definitely all in how you handle it.