I flew into Sywell on saturday in the rush hour. Several hundred aircraft managed to sort themselves out and land with very tight spacing, the only call being 'Type, G-XXXX final 03 grass/hard. (Apart from the inevitable few with verbal diarrhea). It struck me that it could have been done with no calls at all. Departures excepted.
I agree. As I said earlier lots of calls in the circuit only really works if the calls are commensurate with the amount of traffic. For major events it would cause chaos. At such events care is needed and everyone must do their best to follow the join procedure for the event.
I dont think this necessarily proves that things work well without calls because 1) most people are on their guard at big events, 2) lots of other traffic makes it more difficult for them to join the wrong way on go round the ciruit in a different direction (but not impossible), 3) these events may attract those with more experience.
The danger is more likely to occur with much less traffic when someone pitches up unexpectedly and perhaps is new to the field. For those pilots the calls help, and cant do any harm.