I totally agree with you, BUT ignorance isn’t an excuse. It’s a company Slack. Same, as you said, when people download porn on their company computer or send stupid emails. It’s not your private account, everyone knows that. Anyone, in this day and age, who assumes privacy first is missing the boat and it has nothing to do with Slack. The company using Slack as an interface should be clear that all messages can be seen. The subtitle makes it Slack’s fault and I would not be surprised if Slack could find a legal issue with the clickbait subtitle.