For context, a few things I have learned:
(1) People on the internet are not the norm. They are not necessarily not the norm either. However, there is an audience the internet acquires which overrepresents certain personality types.
(2) Most consummate internet users are hostile to accomplishment. They would rather play in the virtual world. And for them, it is play: there is no intended result. They will say or argue anything and everything to avoid facing this, even if we're only talking about a few keystrokes.
(3) People who have mental problems, whether biological or behavioral, are overrepresented on the internet, as are those who have not found any purpose in life.
(4) Many people come to the internet to feel good about themselves by putting other people down. It's a virtual world, and thus they view it like television: a way to make the ego feel better by belittling others as a form of "entertainment."
(5) No one can tell you're a dog on the internet -- or a loser who's secretly bitter.
(6) The above groups will more than anything else attack anyone who rises above their behavior.