To be honest I think this is linkbaity - it's the same quotes that have been acknowledged more or less openly since spring. Maybe he's a bad person, maybe he was just a typical shit-talking 19 year old. It's kind of meaningless without the context of their other conversations; for all I know it's some running joke that went between them, or a movie reference or whatever.

What significance will this have? The lawsuit from the twins is parked in the courts, and the breach of contract one launched recently is entertaining but not very likely to succeed. When the movie comes out next month everyone can hate on the socially awkward guy and argue about whether he deserves his millions or not, probably on Facebook. I think the only consequences are to boost movie ticket sales a little and make Zuckerberg even more of social recluse. Even if he is an arrogant jerk and every bad thing about him is true, so what? Has he killed anyone? Was anyone forced to use Facebook? I wasn't, I logged in 6 months ago and set my account to have minimal sharing permissions, and I don't think there was ever much that could be called scandalous there anyway. He doesn't seem any worse ethically speaking than the YouTube guys.

The only thing I have a problem with is the idea that once you get anywhere, everything you ever said on the internet is going to be dug up by someone because now there's a market in discussing your personal details, and digging them up requires almost zero effort. There's a big difference between standing in the metaphorical public square shouting your opinion to the world (which you expect to have recorded forever, for good or ill), and saying something random in some dimly lit restaurant booth to a friend, only to have it analyzed worldwide as if it were the crystallized essence of your personality many years later.