I have heard and read many claims of SRA primarily focusing on areas of the west coast of the United States.
Having been at Bethel for 11 years I can swear that I saw absolutely no evidence of ritual abuse, satanic or otherwise, except for the emotional/psychological abuse common throughout the Cult of Jehovah's Witnesses.
I believe there has been some isolated examples of perverted and sick actions by people who happened to be within the Jehovah's WItness congregations but it was not sanctioned nor part of the Organization's practices.
Some victims of this sort of abuse are damaged emotionally and can often attempt to put disjointed memories or thoughts together so they can make some sense. I don't think the Pat Garza's are intentionally lying but I do believe their perceptions, memories and sense of balance are not completely straight.