What social responsibilities do fiction authors have (if any)?

In 1977, Stephen King published a novel about a school shooting called Rage. It is somewhat infamous, as it has been connected to instances of real-life school shootings. King, in response, allowed the story to fall out of print and has never reissued it. The novel has a lot in common with other YA stories and tropes: a disaffected protagonist, meddling/out of touch adults, and newfound social connection with peers. While the main character is undoubtedly disturbed, the novel feels somewhat uncritical (or potentially even supportive) of his actions.

Certainly fiction is a space where authors are free to explore any point of view or theme they wish. The beauty of fiction is that it is limitless and consequence-free. No people are harmed in Rage because there are no people in it. Its characters are merely names and ideas--they are a fiction.

Nevertheless, Rage addresses a real-world phenomenon, and the beauty of fiction is that it doesn't live as a lie. As Ursula K. Le Guin writes,

"In reading a novel, any novel, we have to know perfectly well that the whole thing is nonsense, and then, while reading, believe every word of it. Finally, when we're done with it, we may find - if it's a good novel - that we're a bit different from what we were before we read it, that we have changed a little..."

We like fiction because it resonates with us, exposing us to themes that can affirm, shape, or challenge our mindsets.

With this dichotomy in mind, I'm torn between whether authors should be free to explore anything they wish from the safety of make-believe, or whether they have a social responsibility because their words carry messages and ideas that directly impact lives. I'm not sure what to think, and I can come up with great arguments for both sides. What's your take? What social responsibilities do fiction authors have (if any)?