As for complaints, perhaps you would care to explain why it is NSW has legislation explicitly preventing private carparks from accessing the vehicle registration database if there is "no issue"?
It's the same in Victoria, you can't access vehicle records unless with a court order.
Aircraft are registered federally so state law is irrelevant.
How about this...... has having your aircraft details publically avaialble caused you grief or harm and in what way has this occurred?
And let's face it, there aren't going to be that many bills so this person can be usefully employed in other admin roles too.
There will be a bucket-load of them. Many Raa aircraft operate of airfields under Avdata agreements every day all over Australia. Perhaps if everyone was paying their bills, we could all pay less, or alternatively that extra money might find it's way back into improved facilities at regional airports.