As a Tower controller, yes we do submit an incident report if there is a VCA. As a proactive measure, if we can identify the aircraft in question, the PIC may receive a questionaire from our Safety Management group.
What we try to achieve is not to be over excited about what happened if all it was was a VCA with no other implications, but we really would like to know why it happened. In one case, the pilot misidentified a visual fix. Nothing we could do about it, but the pilot now is aware of what happened. In other cases it could be lack of maps, insufficient training, misunderstanding, etc. If we can identify the cause and steps can be implemented to reduce the risk of it happening again, then the safety system is working as it should.
Yes, the pilot might get a please explain from CASA, but that is not why we submit an incident report.
If you are going to fly near controlled airspace or a control zone and are unsure of what to do, call the centre / Tower and have a chat. We don't bite (usually
).