Jose wrote:
I think that the pilot requesting taxi
instructions was unaware that CD was also on the same freq


...which brings up another pet peeve - controllers who use both
frequencies to broadcast on. I'm on tower and hearing a lot of ground
radio traffic, I turn to ground and hear the same ground traffic, and
can't get a word in edgewise. So my motor's running at the threshold
while three airplanes are taxiied into place, two aircraft get IFR
clearances and a reroute... what's a pilot to do?

A controller using multiple freqs was a contributing factor in an ASRS report I
filed one time. Briefly, I called clearance, was read my clearance and given a
taxi clearance on the CD frequency, was told to follow another aircraft. I
continued to monitor the freq I was on (CD), didn't realize that the aircraft I
was following had switched to the tower freq. I followed the other aircraft
right out onto an active runway. I thought he was crossing that runway enroute
to another one, but he had actually been cleared for takeoff. Clearly an error
on my part, but IMO the use of broadcasting on multiple freqs was a contributing
factor.