Because the internet makes it easier to say what you want w/o any real punishment. You remain anonymous the worst somebody can do is CAPS LOCK you to death. lol. But, it is pointless. I hate when people start s@%t in person or on the internet.
I normally try to stay away from it so I won't get involed but if someone is after my friends that is what starts to get me upset and I tend to seem angery at times but that is only because I am protecting the ones that I love and don't want them to get hurt.