The difference between "doxxing" and "journalism" can indeed get blurry every once and awhile[0], but it's usually not that hard to figure out.

Journalism is newsworthy and has the intention of informing people in the public interest, doxxing is typically not newsworthy or in the public interest and has the intention of harassment or intimidation.

[0] http://nymag.com/thecut/2015/07/gawker-slammed-for-story-out...