Comment by pjc50

This happens more than most people would recognize. Every now and again a "teen bullied to suicide" story makes the news. However, there's also a strong taboo on reporting suicide in the news - precisely because of the same phenomenon. Mentioning it can trigger people who are on the edge.

It should be obvious that if you can literally or metaphorically talk someone off the ledge, you can do that in the other direction as well.

(the mass shooter phenomenon, mostly but not exclusively in the US, tends to be a form of murder-suicide, and it is encouraged online in exactly the same way)