The gist of the story is that they used a screenshot to verify somebody's identity, and it turns out the person faked it. However, instead of saying "we made a mistake and didn't verify our sources properly," they go on to spin stories like "But is Steve a prankster, or is he a spammer having second thoughts" and "Regardless of its validity, Steve’s story helped expose a very real issue for Pinterest." Both could possibly be true, but they are just speculating to save face.
The part that annoyed me to make me comment was this paragraph:
"So who is this spammer? Unfortunately, there’s no way to tell right now. Even if another person claiming to be final-fantas07 came forward, the only way that individual could prove his or her identity—a screenshot—could be faked (again)."
Really? A little bit of critical thinking and you could have him make a post using one of his bots' account, or delete a post, or use any other more reliable, actually verifiable source.
So they can learn something about journalism.