The Lawmakers who introduced this Bill must be under the impression that all cyber criminals are bored millennials inhabiting suburban basements. They want to start an American 'civil war' in cyber space, to fix the misguided. The enemy is thy neighbor.
Meanwhile, a real cyber war has been underway for years, populated with sophisticated state actors, agents of chaos and organised crime. Vigilante counterattacks here and there will be met with either contempt, a vicious up the ante campaign or they will fuel the American cyber 'civil war' to their own advantage. My bet is on the latter.