Why are there lawsuits against the WTS/GB but not lawsuits against the parents of the victims???
Reporting that you have (or your child has) been abused to the police is a very difficult action to take. It requires a huge amount of courage and humility and the whole thing is awash with complex emotions. In some cases it is difficult for these ones to see that reporting the abuse not only serves justice in their case, but also prevents the abuse of others. This should not be difficult for the elders to see, however.
Furthermore, in many cases the elder's negligence goes far beyond failure to report. They have assigned molesters to work directly with children. They have written letters of reccomendation for molesters that specifically indicate that they are good with children and fail to mention anything about the molestation.
Third, there are many accounts of the elders discouraging parents/victims from reporting the abuse. Because of the power that they hold (being that it's a cult that employs powerful mind control techniques) they hold undue influence over these people to prevent the reporting of abuse. Their discouragement of abuse reporting is not without teeth, either, as there have been numerous accounts of victims and their families being DFed for attempting to report the abuse or warn others that are at risk.
Yes, in many cases the parents are negligent as well, but lets not pretend that this cult has had nothing to do with the continued abuse of tens (or hundreds) of thousands of children.