Because the correct minimum set of people is those who are in the channel when it was shared to the channel… and most people aren’t thinking of possible future information leaks when sharing documents directly into a channel with specific people the document is intended for…

The mismatch makes sense to programmers and IT types who have internalised the “computers are stupider than we make them look” way of thinking… but most normal non computer professionals are probably just thinking “I am sharing this with these people right now.

That’s a setting your IT teams chose to hide from you, our teams channels allow you to set what files are shared with someone who joins.

I’m still not at all sold. If someone put a file in the Ops Team folder of a shared drive then they’re sharing it with all current and future members of that team. The same is true if you post to #ops-team.

To be brutally honest people need to just stop and apply some basic critical thinking to their actions instead of expecting magic.