If your position is "Well they should involve the courts first," we are probably reaching agreement, but we're all aware of how weak the legal system is regarding online harassment, right? Most cyber-crime falls way outside the jurisdictions that are traditionally designed to handle harassment (as harassment was traditionally a very geographically-localized crime).

I'm personally willing to let the bar for "Disclosing enough information about someone's handle that they can be found IRL" lower than "a warrant is out for their arrest."

(This does raise an interesting question: perhaps we do need some kind of new cross-jurisdictional legal organ to decide when harassment raises to the bar of "doxxing acceptable" whether or not it raises to the bar of "prosecutable." That'd be nice to have; then we could have a generally-accepted standard for when it is and is not okay).