Being a Vigilante, what does justice mean in Plato's Terms

Justice is flawed, the justice I know to be true is the law of impulsive reactionary thought, and one in which all emotion is a trigger for instinctive actions. Raw thoughts and impulses are the most basic and tightly coupled into our existence. Our harshest of instincts are those that ensure our survival. All of "civilization" is nothing but a masquerade to hide our true nature and all that is proper. Regulation of our actions …

…which go on throughout our everyday lives. Many will witness the vigilante as the unjust part because their silver platter contains the laws of the ruling government set to the last dot, combined with the guidelines of religion to make a stew of a simple minded race which follows justice and all the laws, because they are afraid of the punishment for whatever unjust action they might interact with in the course of their lives.