My 2c!
Radio calls are very prudent provided they're not overdone to the point of frequency congestion. Doesn't anyone here find the Inbound calls to the tower useful in determining your position relative to others entering the Bankstown area? Knowing someone is at 2RN while you're at Prospect is invaluable... as is hearing someone transmit a few seconds before you - you know where to look if you haven't seen them already my maintaining a good lookout.
Lancer