It happened to me once that I chained my bike to a stairway railing, certainly not moveable. When I returned, my bike was gone... actually the railing was gone.

It happened to me once that I chained my bike to a stairway railing, certainly not moveable. When I returned, my bike was gone... actually the railing was gone. It was about to be replaced, so the construction workers had cut away the railing. They had placed my bike carefully a few meters away, though it wasn't tied to anything any more, as the railing was removed :).