VH
With respect, I know a lot of instructors read the Private Flying Forum and most are 'private flyers' as well as professional pilots.
There is much to learn form this tragedy and I believe that for a balanced discussion the two sides of this arguement are inseparable and contributors from all walks of 'aviation' should be encouraged.
Where does the moral obligation stop? Does it stop with the CFI, or the Senior instructor, or the junior instructor or ops desk clerk? The Fireman perhaps...Air Traffic....or the PPL who just drives into the carpark as the overloaded aeroplane starts taxiing. We all have an obligation to raise our concerns - but what the P1 does about that is his decision. Again, strength of character on all parts.