I wonder about this...the bicycles left chained to posts and trees. Left to be dismantled over time. Who forgets their bike? Why do they forget them? I had a really neat book of photos done by a guy in the village in New York City of all the abandoned bikes he saw. There were images of complete bikes and partial ones, down to just the basic frame. But why they're abandonned puzzles me. I spoke with a former student of mine about this once, but can't remember what we concluded. Obviously, the conclusion didn't satisfy me because I continue to ponder this.