I have been to many halls and seen it in every hall, more noticable in small town congos.
The congo I am in now, there are two predominate families, One family is from the PO , one is from elder, both with many kids. The PO's daughter is married to the elders daughter. Anyway, the elder has been removed recently so I think there will be a huge shift now.
It is horrible for those that are not "IN" and it is a terrible form of control and abuse, but......they learned it from the best.
purps