Evil because they can be.

What causes people to act be evil?

Has the internet, in it's very essence that provides anonymity to the weak that cannot act in such a manner when face-to-face with someone, created a place where the weak can unleash all their anger and hatred by being an ass?

I mean, there's always rude people, but what about the people that -are- nice, and they wouldn't hurt a fly face-to-face, but when they've got a shield of anonymity... Is that who they really are?