The tone of the article is sort of being in awe that mark zuckerberg essentially had some scheme within early Facebook logs / code / database to save failed password attempt data and he just as a stroke of apparent genius decided to use those passwords to login to those peoples accounts. It’s like saying he stole the janitors key ring and he tried all the keys until the door opened.. pure. Genius.
There is absolutely nothing "cool" about what he did or how he did it.