but because the priests are human and corruptible, they manipulate the trials at best to save those they consider innocent and punish those they consider guilty, and at worst, save vs punish based on coercion/politics/personal gain. since people are people and word spreads, plenty of innocent people would be unwilling to submit, and plenty of guilty people would be willing.
She is not even partially right. Correlation does not equal causation! Far more likely your "deviancy" makes you get tattoos, not the other way around.