Different users (operators of Chatto servers) will have different requirements for this, so it's pretty much "configurable" in the sense that eg. a business tha

Different users (operators of Chatto servers) will have different requirements for this, so it's pretty much "configurable" in the sense that eg. a business that's hosting a Chatto server for their employees can disable shredding account deletion and just deactivate accounts instead, leaving their data intact.