Yeah, a good point. I ran into this old Robin Hood 3-speed locked up at the train station every morning at 7:15, and it was inevitably there every day, without fail, locked in the same position. It was also there when I got off the train in the afternoon, sometimes as late as 6 pm. Naturally I started to wonder if it was abandoned (foolish in retrospect) so one night I rode by the station just to see, and sure enough it was gone. It just belongs to someone with a really long workday.
So, go by the bike at odd hours. Make sure. Also, check on that chain, see if its rusted over. Report back to us!