Manufacturer error
Any RAM chip that is operated within the manufacturer's guidelines should be able to handle any pattern of address and/or data thrown at it. If it fails, it is faulty and should be returned for replacement or refund. Describing the process as 'hammering' unfairly shifts the perceived blame in the same manner as 'overclocking' or 'over/undervolting'. It comes down to a design error in the chip and if the entire line has to be withdrawn and the mask redesigned from scratch, so be it.