I had a bike stolen years ago. I actually did lock it up (with a U-lock) but I locked it up outside and that was foolish. You see, first the thief came by and stole my unsecured bike seat. I should've brought the bike inside, but no—I assumed what had been told to me, which was that a U lock was "indestructible".

Well, I found out the hard way that that style of lock was very much destructible. The bike theiving SOB came back and managed to break the U lock, which I found laying in two mangled parts around the base of the pole where my bike had been locked up to.