It would be kinda fun to bring in pots and pans and join in. Just keep on making noise through the whole thing, especially whenever they tried to talk. Just play dumb, God knows that crowd isn't bright enough to know better.
Sadly, if you join in the noise-making, you will be counted by media observers as part of the protestors who want to drown out the President. Huge posters with pro-Bush messages would work better.