Also, it's impossible to provide tangible proof for any opinion. My opinion is that Zuckerberg is a very bad person, and that is not a personal attack. A personal attack is never an opinion. Rather, personal attacks are when people have the intent of attacking to insult, to hurt, to throw wrenches into arguments, and so on.
Hacker News might disagree and appeal to their arbitrary rules about what's right and wrong, but to call my comment that "Zuckerberg is a very bad man" an assumption of malice, an unproven claim, or a personal attack is more of all three against myself than anything.
In short, everything that the new TCP/IP landscape brought and many geeks loved at first sight. It's a very silly word, but it's useful, because you can't start every conversation by debating the value of decentralization. That way you can signal that you are not interested in the never ending conversation about emergency services and quality of service, and instead want to focus on what kind of service innovation a network of peers could bring.