The point of the Nightw@tchman is that it's political protest but in a more traditional vein. He can get to people and put his views across much easier with an acoustic than with some crazy killswitching, feedback and noise manipulation- as evidenced by the fact that he was even on the Jools Holland show.
To be honest, I haven't heard any of his Nightw@tchman stuff, but I think he's a brilliant guy and I have nothing but respect for him. ^_^