Not if it is a deep cultural taboo. So in the early years of the archologies, before the phylacteries, nightmares would roam the halls, and many people died. Then someone discovered a crystal with the right resonance to counteract and suppress the shadow. Now it is centuries later, and most of that is legend, but still something that is used to terrify children and adults.
And remember, it is in no way conscious, so it's pretty useless as a way to exert power. It's like juggling nitroglycerin.