I have a great response for this; it usually shuts them right up. I say, "No, I didn't see it. Michael Moore is just the poor man's Noam Chomsky. And I've already read Noam Chomsky."
It's so funny. If they've read Chomsky, they know I'm right and they shut up. If they haven't read Chomsky, they feel intellectually inferior (which is worse than death to a liberal) and they shut up. Either way, they shut up. And I smile a cat-like smile, and stare at them till they go away. It's very satisfying.
These bozos wouldn't know who Chomsky is. All they know is they hate GWB. John Boy said to me re F911 that the Bush family had ties to the Saudi royal family. All I could say to him was check out the ties Bill Clinton had to Marc Rich. I doubt he got it.