V is like a mythical situation. It's an allegory for what could happen. V has philosophies within it that actually warn against things like that happening.
You are not going to get peace with millions of armed men. The chariot of peace cannot advance over a road littered with cannon.
When we were talking about this, an idea for this master vigilante, it was an urban guerilla. One of my ideas was that he would be a member of the police force who turned on the government.