Cycling in Sydney Australia
This happened on the day I bought my bike. I live in a studio apartment with an open car park where I initially left my bike locked to a pillar. After finishing my dinner I decided to mess with it, then I found a note stuck on the frame suggesting me not to leave the bike there, for the writer of the note has had his bike stolen twice there, even with the lock. I took the advice and now awkwardly carry my bike up and down the stairs between my room and outside.
I would have never knew that bicycles can still be vulnerable to theft even with locks.