I rarely read books with violence in them. Mystery novels are about the only ones. Even then, I prefer books where the violence or murder happens before the book begins, and I want justice by the end.
As an author, I don't like to write violence, but I have on a few occasions, when I felt like I had no choice in order to tell the story. I guess this post would be better titled "Almost never there - graphic violence."
Whisper Falls has instances of physical abuse during the series. The 18th-century half of the first book shows the plight of female indentured servants. I couldn't have given a true account without letting the reader see the brutality that haunted their lives. Our hero has been the victim of bullying. It's hard for either of those plot points to be authentic without alluding to some violence. In book 3, the villain is again the cause of abuse to both the hero and heroine, although less is visible on the page. The reader knows it's happened, but the details are not graphic. In this series, justice prevails.
In The Possibility of Somewhere (writing as Julia Day), the realities of the heroine's life are fairly harsh. Physical abuse lurks constantly as a possibility. The heroine, Eden, is prepared to take care of herself, though. "The Mundys of the world believed in a sunshiny
legal system... [but] I
knew better. The Edens of the world grew up in trailer parks, and they had
different rules. Justice
changed depending on where we lived."
So, perhaps instead of pledging to never write violence, I'll promise instead to limit it to the minimum needed to serve the story, to describe what's happening without gratuitous details, and to see that the criminals (perpetrators) reap punishment for what they've done.