Incorrect. At least read the conversation you are trying to enter. There are several references stating this should be done. One post even describes where the term "fragging" comes from. The post I responded to stated a soldier could either live with the guilt of what he does or turn on the officer that gave the order.

You are also wrong that you can disobey an order to shoot civilians. It is not always morally acceptable. That will get someone a court martial. A soldier on guard duty on a military base sees several guys jumping a fence and entering an ammo depot. "Halt! Are you guys military? Because I'm not allowed to shoot civilians breaking onto a secured facility" ... said no soldier ever in the history of soldiering.