If administrators are careful there is always a risk of accidentally dragging an item and moving it accidentally. It would be more desirable if we could disable drag and drop as we can simply right click > Move an item which is a more deliberate action than a click and drag.
ITMS 8.x
This feature is available beginning in SMP 8.7.3 release.
Add new setting DisableTreeDragAndDrop via Core Settings as shown here:
and set it to 1 to disable drag and drop