Who am I?

I have no respect for justice I maim without killing I break hearts and ruin lives I am cunning and malicious and gather strength with age The more I am quoted the more I am believed I flourish at every level of society My victims are helpless, they can't protect themselves against me because I have no name and no face To track me down is impossible The harder you try, the more illusive I become I am nobody's friend Once I tarnish a reputation, it's never the same I topple governments and ruin marrieges I ruin careers and cause sleepless night and heartaches I spawn suspicion and generate grief I make headlines,headaches and heartaches I make innocent people cry in their pillows Even my name hisses