Suppose this gizmo allowed me to capture an aircraft in a magnetic field and divert its flight path. Suppose I was in Manhattan on 9/11/01, and I saw a plane headed toward the North Tower. Suppose I turned on my gizmo intending to save thousands of lives, then thought to myself, "Wait a minute, the hijackers have free will" and turned my gizmo off.

Would this be a moral thing to do?