"For one in authority is God's servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. He is the servant of God...."
Romans chapter 13, verse 4.
Essentially, obey the rules-- be it in your town, in your school, on a forum or chat-site. God gives authority and power so that people do not get out of hand. When someone is punished, they are justly punished according to the law if the law is upheld properly.
And the law must be upheld. Not often do you see a place with people but no law, and having not had a law for a long time.
So obey, just as you're commanded to. But remember that the supreme law is the law of God, and all others are under it.