Let’s talk about the “usefulness” filter. Presumably we would all agree that there are times when it is useful, even necessary, to share information about a person that would infuriate him. But deciding whether this is the case can, I think, be troublesome because the truth is most of us sometimes get a sort of sickly sense of schadenfreude in sharing nasty information about other people. For example, when we “vent”. We feel as though we “need” to get something off our chest, but “can’t” talk to the person the venting is about. Is venting, in fact, ever okay, or is it something we modern people have decided it’s fine because it makes us feel better? If it is ever okay, then under what circumstances?
When is it legitimate to share details of someone’s bad history in order to protect another person? An extreme example I think we would all agree to is letting a parent know that she shouldn’t let someone you know to be a child abuser be around her children. But are there other, less extreme instances in which it is all right?
Also, we usually discuss all sorts of things with our intimates in which personal information about others may be shared but the intention is not malicious. For example, a husband and wife presumably tell each other about their childhoods, and the bad behavior of their parents may be part of some of those conversations. Would it be wrong even to tell spouses and close friends something like, “My mother abused me” or “My father always favored my brother”?