People don't like to encounter the things like sexism that they encounter every day in real life in their games. They often play rpgs to get away from that sort of thing. It is the referee's responcibility to know his or her players and play the game world accordingly.
That's up to the referee, not the world writers. Because someone will always find something they dislike even if that's not the author's intent. (Never mind extreme examples like Carcosa ;))
