Take suicide threats seriously. I came across a grad student blog recently that had tons of suicidal ideation on it. Eventually, it got so bad that I reported her to her campus police. I’ve never interacted with her and am a complete stranger. Today, her blog was deleted after being active for years, so I can only assume someone intervened. My only regret is not doing it sooner. Care for your fellow humans, even as a stranger, and listen to their pleas for help.