After many years on this earth, I have decided that there really is no reason at all to be mean. It is just as easy to be nice.
People are mean because they can be.
And mean people suck because they make everyone else miserable. Their selfishness in our altruistic society makes me sick. Mean people will hurt you to feel better about themselves. Mean people get angry easily over insignificant or trivial things. Mean people will not work with you.