Are you kidding me? It's a shitty thing to do, but it's legitimate journalism. Journalists exist to find out all sorts of stories. Sometimes they feel shitty to some people but they are the bedrock of a functional democracy. We need them. even if sometimes we don't like what they say. And there are just as many people who feel legitimately about wanting to know who he is then those who don't.
It's horrible to even think about threatening someones life, just because they maybe did sloppy journalism. Even if it does affect him, it doesn't FOR SURE mean something will happen to him. If it's really him, he knew this day would come. Threatening to kill journalists is horrible.
While I disagree that this constitutes legitimate journalism, as pointed out by the ethics violations I've posted elsewhere. I absolutely agree that retaliation (of any kind) is completely inappropriate. People will lose respect for her, and/or it will negatively effect her career, or perhaps it will just be a slap on the wrist that will help her be a better reporter in the future, but no one here has any right to attack or harass her.
Her life should not be threatened, and her privacy should not be attacked! What argument could you possibly have against her in the first place if you're willing to do that?