The guy is 26, and has grown up while building what's almost certainly the most significant tech company to be started since Google. Despite the challenges inherent in building a company whose currency is personal information, almost all of the major decisions that we have enough data to judge have been proved smart and non-evil in hindsight. He has hired one of the best engineering teams in the Valley. Trite as the observation may be, Facebook has tangibly improved the lives of me, my family, and almost all of my friends.
By any fair metric, he has at least earned the benefit of the doubt. And while plenty of criticism of the company's actions is justified, the bitter schadenfreude that surrounds his mis-steps is unseemly and lazy.
To the extent that Facebook has made mistakes, the speed with which social norms are changing means that no matter how good a job they do, screw-ups are almost guaranteed. This applies to everyone: Google messed up privacy in Buzz, and, despite dealing with far less private information, Twitter, too, have had various issues (e.g., leaked private tweets).
I'm embarrassed to be a part of the Valley tech industry when I come across this kind of mean-spirited pot-shot.
[Disclosure: none. I don't know him, and don't work at Facebook.]