Hands down, of all the companies I've worked for, I've never met so many rank and file people who cared about doing the right thing so much. Most jobs are just jobs. People do their jobs and they get money and sometimes they try to do a good job. And there are plenty of people like that at Facebook, the majority of people are like that.
But, nowhere have I seen such a large percentage of people who actually care and who care strongly. It is honestly shocking, coming from jobs where people just do their job and avoid stirring up trouble. These people do stir up trouble. And it's hard work to fight the inertia. Sometimes they fail and become bitter and burnt out. Sometimes they succeed. And when they do they are rewarded.
So that's what I wanted to say. Facebook is a big place but people do care about doing the right thing and doing the right thing is rewarded.