So that when I say that they really do have a zero tolerance policy for anyone using their internal systems to violate user privacy, it's not because I'm eager to defend them. It's just true (at least, it was when I was there). There are internal systems dedicated to making sure you have access to what you need to do your job, and absolutely nothing else. All content you interact with through internal tools is monitored and logged. If you get caught trying to use whatever access your job gives you for anything other than doing your job, security immediately escorts you out of the building. This is drilled into new hires early and often. For everything Meta gets wrong, they really do take this seriously.