[barrysteve]

It makes sense to address information leaks in an a cc:all email. And it makes sense to give the leaker a polite way out of an awkward and difficult position by suggesting they resign quietly. The email tries to command the employee to leave or face consequences. Offering the employee the option to leave (as a way to avoid implied consequence) is better.

The CEO calling it 'an act of betrayal', appealing to the social good and appealing to building a company culture, is an admission to my ears that company structure and his authority is not his primary concern.

The CEO already has the authority to remove someone/everyone for this behaviour, so the appeals to the good and to not betray a personal relationship with Mark Zuckerberg himself or cultural connection that Mark wants, just ring hollow. If the leaker-employee sees benefit in revealing secrets to the public, losing the relationship to a billionaire he's never going to meet, or cutting down a company culture he is willing to lose, is not a deterrent.

Setting up a tone and example for future leakers, is better done by establishing the reaction authority will have to the behaviour in the future.