Every organisation has a Slack channel (or similar) where grievances are aired. It's a question of whether management want to have it where they can see it or not.

I wondered that too. What does the slack channel give their organization that it didn't have before? The New York Times is clearly capable of operating without a slack channel. Does it make them more efficient? Can they replace some amount of middle management or meeting time with it? I'd be interested in reading an analysis that made an argument for or against slack.

Something good is coming of it right now, as someone’s right to personal privacy and safety is being discussed on it.