I suppose you could argue that exposing frauds is a form of doxxing, but so could whistleblowing. I think there is a line to be drawn[0], but their names? How do you talk about the key players in a scandal if you can't use their names?
[0]: That guy who took a picture of Zoe's work place and posted it on twitter was over the line, for example. Then again, Zoe posted Mike Cernovich's address on twitter and encouraged her followers to swat him.
But when we must talk about them, we can use their public names and get along fine. Getting their former identities doesn't help people who want to clean up journalism, it just helps dig up background dirt.
All this shows the ridiculousness of the charges the Van Valkenburg and Flyns of this world are making, then the gullibility of their followers.