I'm sure the Australian tax authority has kept a copy of this confession as evidence of you breaking the law. If I were you I wouldn't wear those boots outside the house for at least six months.
Exactly how is that a crime? In australia you can import anything under AUD1000 without paying GST.
PL/I -- "the fatal disease" -- belongs more to the problem set than to the solution set. -- Edsger W. Dijkstra, SIGPLAN Notices, Volume 17, Number 5