Has no one in this thread brought up ONE MAN, TWO GUV'NORS yet? I thought that was the pinnacle of audience interaction, especially the way it blurred actual audience members and, well... "more involved" audiences when they dared.
Words don't deserve that kind of malarkey. They're innocent, neutral, precise, standing for this, describing that, meaning the other, so if you look after them you can build bridges across incomprehension and chaos. But when they get their corners knocked off, they're no good anymore…I don't think writers are sacred, but words are. They deserve respect. If you get the right ones in the right order, you can nudge the world a little.