I am going to keep this short because I'm on my phone, but the post above yours is a good one. On top of that, posting publicly released statements- presumably real- is substantially different from then going and attaching personal info to it specifically. The availability of the info is not te issue. The combination- and the obvious intent and possibilities for ill use- are. (I'm sure posing name and address is ripe for positive use, yea?)
The verification of the info? Who knows. Thousands of viewers aren't going to go vet the info. The only thing they will likely do with it- even if not often- is misuse it. The "public shaming" aspect of it is overblown and ripe for getting nasty. The whole thing is simply the wrong direction to take- and it's not jus this particular incident either, yea? This sort of campaign has been growing in popularity, such as the recent spare of this in he UK that was posted just a few days ago, which ended up having official consequences as well - something at leat absent in the American case.
So the argument is that this is a bad thing because these people did not in fact make the controversial statements, and the tumblr was perpetuating a hoax? That is disturbing, I agree. But you haven't put forth much of an argument if they weren't falsely identified.
So we know the identity and locale of these people - and? There's no addresses. So what happens to them? This is what I want to know, are these people likely to be targeted by violent individuals? Is there precedent for that?
I also want to highlight that the identifying information was made public by the people making the statements, not the person who created the tumblr. That would be the key difference between say, a hacker going in and searching private information and what actually happened.