Wikileaks exercises caution in what it leaks. I highly doubt wikileaks would leak personal information of millions of users. Their aim is to open up governments and public agencies, not people's personal lives.
I think he'll be losing some of his libertarian fans if he publishes information of people who simply want to be more free.
I understand that in some cases redacting names weakens the impact of the leak and its political statement. However, releasing the name of some random informant working on the ground in Iraq has no substantial effect on the impact of the whole leak, but can have an enormous effect on that person's life, especially if he's killed.