Pretty much every hobby has them. Every hobby that involves flashy gizmos, that is. Kids with plenty of money and underdeveloped social skills who show up and want to belong. They buy all the flashiest toys; try and jump into every discussion; want to be respected.
The internet has potentiated this phenomenon by offering the online forum or bulletin board. With the societal rituals of meeting people face-to-face stripped away, even the most awkward can try and jump right into things. Unfortunately, interactions with other group members that bleed into what is sometimes termed "meatspace" (as opposed to "cyberspace") quickly expose deficiencies in the kid's socialization, responsibility, or ethics, and he receives negative public feedback. He reacts in a way that seems appropriate to his adolescent mind: by hurling insults, and sometimes threats.
If the group he wants to belong to involves collecting comic books or radio-controlled cars, this behaviour will probably just result in ostracism. His failure to follow through with payment on a purchase of Amazing Spiderman #21 might even land him in small claims court. On the other hand, if the group in question collects firearms, well... let's just say that his juvenile histrionics may get taken a bit more seriously.
The computer makes it easy to not realize that somewhere, down the line, there are real people on the other side of that monitor and that, however indirectly, the keyboard is connected to the real world. And as emails and posts scattered across various inboxes and web fora are proving in Mr. Wong's case, the internet never forgets.