The most recent unlawful event that I am aware of occurred in May 1975, a pilot flew his Tiger Moth under The Bridge as a tribute to the passing of Sid Marshall. Sid was an Australian pioneer of aviation, the pilot who flew the Tiger is still operating a successful aviation business at Bankstown. To the best of my knowledge the guy still owns and flys the Tiger, having had his licence suspended for a period of time after performing his misdemeanour.