Do they have a right to not report crimes to the authorities?
I'm not so sure it's a question of rights as it is the mindset of the particular society. If you or I found out children were being tyrannized in our particular Christian society we would not just simply allow the leadership of that society to quietly sweep it under the rug and allow the abuse to continue. We would fight to dismantle the leadership that allowed the abuse to occur and would fight to make sure the abusers were prosecuted. Romanist eccelesiology hinders individual members from doing that and that general mindset is built into the system.
Free societies are messy and it's an awful slippery slope to try to compel a particular society to change it's mindset.