There's an interesting, maybe kinda icky article here on a man who is - or was and could be again soon - one of the more privileged users on Reddit. And then there's John Scalzi's intelligent response.
Only a couple of things to add:
1. A number of Redditors - some for obvious reasons - may disapprove of "doxing", enough to elevate it to a high crime in their own circle. But Chen never promised not to do it, and can't be seen as under any obligation not to.
2. One problem with the explosion of communications media is that no effective etiguette has arisen. Thus the rules that are applied are almost always self-serving by the user. A guy yaks at the top of his lungs at a cafe, and no one employee or patron wants to scold him because he'll just yell "Do you fuckin' mind? I'm on the phone." This sort of one-sided expectation of privacy, whereby kids posting Facebook pictures don't merit privacy but those who repost them as porn do, seems to be an extension of that. The rules of the road are defined by what's convenient for those who make the rules. Or at least want to.