Cut, slash, rip the parts you deem unneccessary or faulty. Direct the arguments to conclusions. Force people to respond meaningfully to points raised. Do all this, please. I don't feel heavy-handed moderation would be counterproductive, it would just be very much work, a fulltime job. There would be some prejudice from the moderator, but this can also be moderated through separate feedback.
My experience with moderation is very good. Where in the free for all of talk.origins Konrad Lorenz was found to be mainly naive, on the moderated sci.bio.evolution he's shown to be for what he was, a fanatical nazi eugenicist.
regards,
Mohammad Nor Syamsu
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