If you are going to "fight" it must be legally. These organizations are not just concerned with 1) the RC but child abuse in all its locations which means changing the laws in the states and countries.
The laws re child sexual abuse are not written to target certain religions but any religion or organization.
I would check what has already been done with this issue regarding the WTS as Gopher says. I would also check with Barbara Anderson who has been fighting on this front for years and knows what has helped in the past.