REDDING — One morning four years ago, a recent graduate student who lived in San Diego and had an unusual knack for shooting a bow awoke to a flood of hate messages on her Facebook page. Jen Benedet had launched a program to teach kids how to hunt, and animal rights activists weren’t happy. They accused her of turning children into murderers. On top of trolling her internet accounts, as well as stalking her at home, they started an online petition to “stop Jen the Archer,” thrusting her to the center of an international debate over hunting. “All these things...