Hangar Flying

I'm curious as to how many carnard drivers are out there that are using Belleville washers to secure their propellers?  I for one have converted after discovering that my prop is no longer air worthy.  I just no longer believe that bolt torque is a good (safe) measurement of the force needed to keep the propeller on my plane.  Do you feel the same way?   Have you ever come close to loosing a propeller in the air?