My last job, everything was a secret. Documentation was in people's minds. I was practically the only person who ever wrote public documentation for the team. Most people kept personal passworded one notes where they kept their own documentation.

Lets not even talk about beyond the necessities for a team. Salary? Oh boy was that ever secret. The one guy had an instant where he was oncall, major outage in the middle of the night and he didnt wake up to answer the alarms. Big client billionaire ceo demanded the guy be fired. Boss went around tell everyone that we were going to pretend he was fired, but he wasnt fired.

So naturally when this guy gets a new job, he tells everyone how much $ and benefits he's getting at the new job. He even tells people how much he used to be paid. People were freaking out. Minimu wage was $14 at the time and some senior sysadmins were only getting $22. LOL so many quit within a month or so.