flying from YHOX 20 hrs a week, every close call and display of poor airmanship has been a VH registered aircraft from Bankstown, and almost every incident has been poor circuit procedure, eg, landing on the wrong runway direction, and never using the radio!
fortunately most of the cowboy RAA minority are to scared to come into YHOX, but the GA non radio, no circuit procedure causing immediate dangerous situations, has always been GA pilots