Blue Hauler. Good point on the Jepps quote where additional calls in an MBZ are only to solve traffic conflicts. The worst situation that I have experienced is the daily babel at Point Cook which for some unknown reason was redesignated from a CTAF to a MBZ a few years back. I believe it was because that a senior CASA manager saw the local Mustang do a go around among some lighties and was panicked into declaring the place an MBZ because of this.
What is labelled pilot's discretionary calls has become mandatory calls by every GA pilot within the Point Cook MBZ. Most of these are flying instructors who should know better but who are rather fond of their own voices. T make matters worse a suggestion has been made by members of a local GA committee that the radio calls be increased.
The suggestion is that all aircraft report their position in the circuit starting with joining dead side, first crosswind leg, downwind leg, base leg, final and short final, going around and rejoining after go around. As it is we have the chatter of taxying aircraft reporting clear of the runways when blind freddie could see there is no need.
Currently every man and his dog at Point Cook report several times in the circuit and with up to seven aircraft flogging the circuit it becomes a radio jungle. Add to that babel some twits that report entering the MBZ over flying for the local training area giving the planned whereabouts and altitudes of their particular Cessna 172, Warrior etc for the next 10 minutes then the game gets out of hand.
It is the graduates of these flying schools that eventually get jobs up north and bring their poxy Point Cook radio procedures with them.