There was recently a question from someone new who came just to ask about the 'obvious moon hoax'. I wouldn't be surprised if this has come up a bunch of other times. @Mark Bailey tried to save the question by doing an extensive edit on it to bring it in the bounds of the reasonable, but there was very little chance the OP would ever have accepted that edit. The fact that the community zapped that question with all their might may have discouraged him from re-posting that question framed as an issue with the public perception of space exploration. I tried to encourage him to do that through some supportive pinging from TildalWave, but he seems to prefer to let it go.
I once answered a question about the appearance of the lunar lander, about how to answer accusations that it looked makeshift and was therefore fake. The question got a lot of traffic and votes.
Now, I understand that that is a double-edged sword. The more traffic you have from the idly curious, and the more they vote on answers, especially when they are likely to not have the technical expertise to evaluate them, the harder it is to maintain quality. All the same, in a perfect world we'd have the tools to manage that traffic without sacrificing quality. In fact, that is the ultimate goal, isn't it?
So what if we seeded a question about how we know the Apollo landings weren't a hoax (though I feel a little icky even saying that)? It could defuse such questions in future by giving us the option of referring them to the other question and then tidying them away as duplicates.
It could perhaps be criticized as too broad. At any rate, do we want to go there?
Edit: Skeptics' handling of the question is here. I found the second answer much more convincing than the first, until I read that one I wasn't too impressed. So we could refer askers there. I imagine such questions will still trickle in and sometimes meet standards.