Your deliberate exaggerations aside, the order was issued precisely because of the depredations imposed on the Northern population, depredations you deplore in Sherman's campaign in Georgia. And the order was roundly ignored by the southern army, which looted food and livestock, threatened to burn cities that didn't pay ransom, and grabbed any free black person standing around and sent them south to slavery. And there was no punishment imposed on the southern troops that I am aware of.