Welcome to the club.
Butterfly knives were banned here about 20 years ago, declared an illegal deadly weapon...$10k and/or 2 years gaol for possession.
About a decade ago they banned the lot...well not banned outright, but banned the carrying of any knife in public, with intent or not.
A guy in our rifle club had a cop in another town pull a pistol on him, for having a leatherman strapped to his belt.
A local apprentice chef got done for carrying his chef's knives on a train. He appealed that he was on his way home from work (legal), but was brought down because he did not travel "directly" home from work, stopping for a beer with workmates on the way home.