This person founded an advocacy website in which she posted the personal information of random people online for no good reason other than baseless paranoia. In doing so she became a public figure, and fair game for exposure herself. Not a victimhttp://www.rightwingwatch.org/post/right-wing-trolls-lash-out-against-journalist-for-revealing-identity-of-anti-muslim-bigot/ …
It's the most pertinent angle by far, and to me what put it over the edge in terms of justification for publishing.