IO540,
I am just going by my own experience's as an ATCO, and am interested to hear from a pilots point of view.
Its just that on one occassion, a VFR pilot asked by me to report passing a certain VRP,( which keeps them clear of a busy ATZ) had no idea about the VRP and from the response given, had no map to refer to either.
But was on GPS.
This meant alot of R/T for no good reason, on a busy frequency.
That is just one example of quite a few similar occurrences.
Unfortunately I have only limited flying experience, so I don't get to see things from your side of things as much as I would like to.