"If NASA faked the moon landings, don't you think they'd have faked another major accomplishment by now?"
I enjoyed this one, but given the average reasoning skills of a moon hoaxer, they're more likely to be convinced by:
“Kubrick is dead, you idiot, he couldn't have done a believable moon landing shoot even if they managed to chase Elvis away from the filming set. Did you know of all people Vladimir Putin personally expressed great appreciation for Louis Armstrong? How can you doubt he walked on the Moon after Putin's personal endorsement?”