I say that which way round you have the needle is not going to kill, or even disorientate you, unless you have some other failures to go with it.
And therein lies the crux of basic airmanship - being prepared for any foreseeable eventuality. And instrument failure is, basically, foreseable. Best train your studes to be prepared for it and to know how to use all other aids to their maximum usefulness. Otherwise, IMO, you are failing them.