We keep grizzling about this year in and year out, and the Warriors do nothing about it. If you believe you have a problem then document them into a solid body of evidence.
Personally I would contact all who have played and coached at the Warriors for a specified number of years. Examples can be collated and investigated. This is where expertise will be necessary, I would suggest a skilled investigator, such as a retired CIB member or retired QC. During the collation advice could be sought from our new bestie, Gus.
How the NRL is approached has to be carefully considered, playing the victim will not work, it has to be in the framework of improving the code.