I think a better idea would be for a member to sue over where the money is being spent. I could see this pickng up steam really fast. The news would junp all over the story and it would be (I think) uncharted legal territory. You could claim that since it is a donation you are legally entitled to see what and where your monies are being spent. This would open a whole can of orms for the WTS. Especially if it came out donations to the world wide work were being used to pay off the molestaion cases.
Also you would public suport on your side. The question would be, "why is this charity fighting this? What are trying to hide". That in it's self is a win. I think nomatter what there would be good consequences for this. The question is do charities like the Sierre Club and PETA disclose where thier monies are spent? I would think the argument that they are tax exempt strps them of the right privacy of spendimg.