There’s definitely a fair expectation against gossiping and bad-mouthing. I don’t think that’s quite what the OP is talking about, though. I believe the relevant distinction is that (generally speaking) those behaviors don’t do any good to anyone, including the person spreading the gossip. But consider how murkier the situation becomes if you’re competing for a promotion with the person here:
if you overheard someone saying something negative about their job and then going out of your way to tell their boss.
That’s an interesting perspective. I could subscribe to the idea that journalists may be missing the optimal point there, but that feels a bit weaker than your initial assertion.
I mean, I would not quote a DM without asking first. But I understand that as a kind of charity, not an ethical obligation, and while I try my best to be charitable towards others, I do not expect (nor do I feel in any way entitled to) the same level of compassion.