Those two BBJ's rarely do anything in curfew. But there are other bizjets that almost only come in curfew.
It's such a waste to have this curfew in place. Infrastructure just sitting there, imagine also the expansion to our public transport as a necessity to deal with a more 24hr city, more jobs (oh hey labor party, that sounds nice), and of course less hassles for crew. If you moved near the airport surely the noise is expected. Was for my family, long before any of us were involved in aviation