I think that no matter what is done to moderate the IDD forum, there will always be fights because the theology and doctrine of the catholic-based denominations is so different from the non-catholic-based denoms that the two can NEVER be reconciled. It's like expecting people who only eat liver to sit down to a nice meal with vegans. The two cannot be reconciled, and as the vegans and the liver-eaters get hungrier and hungrier for something that nourishes either of them, they will fight, no matter what they have in common and no matter how committed they are to keeping the peace.
Likewise, IDD nourishes neither group, it only acts as a torture device to remind them both how hungry they are for the spiritual nourishment of a good discussion and fellowship with like-minded Believers, and no matter what there is in common between the two groups, since neither is being satisfied spiritually, the hunger and anger will flare up again and again.
As CF tries harder and harder to accomodate everyone, it nourishes no one, like a restaurant that tries to serve all eaters without offending any other groups sensibilities. You can't have a vegan/Atkins/South Beach/kosher/Chinese/low fat restaurant. CF is trying to have a Protestant/Catholic/Orthodox/pagan/seeker/atheist/non-demoninational/agnostic website, and THAT'S what is causing all the problems, not the posters. We're all just trying to be true to our faiths, which are mutally incompatible, like the vegan and the carnivore.