We had such incredibly heinous group chats on our Slack that if an admin perused through the logs we'd be instantly fired and the company shut down right then and there lol. The paranoia drove everyone nuts which made it more fun.
Every healthy person I know does that. It’s as if human communication required to have secrets before people would relax about opening up.
More realistically only the ones that admin doesn't like, HR doesn't like, or the CEO doesn't like would be fired while the rest would be retained.
Arbitrary discretion in the exercise of power is the bedrock of our society.