It will NEVER be enough to caution through example, however, every example should be documented, told, and retold as often as someone will listen. It is human nature and people are going to do the same stupid things over and over. That is why we call them "accidents". Someone posted to me, when I badly burned myself using gasoline as an accelerant: "It must be tough being a good example of a bad example." Yep. It is.
The writer is correct: the telling and retelling is therapeudic for the injured party, kind of like when you thump your knuckles taking a stuck spark plug out and then jump around for five minutes flicking the fingers in the air as if trying to throw off the hurt. Know what I mean? It does no real good, but somehow it just "feels" better after making the attempt. Who knows, perhaps that is a way to "kick-start" the healing process. Ever try to just stand there as if nothing happened. IMO, you can't do it.