To say that someone who does not have a GPS will not know exactly where they are all of the time shows a total lack of understanding with regard to simple basic radio navigation.
Evidently, DFC, you are incorrect in
some cases. Did you watch the video?
Piltdown Man - I agree 100%; I always thought that a distance check (to
something, usually a DME but could be a VOR radial) at the actual or expected GS intercept was a standard procedure with any ILS.