I almost posed this question to one of the wall builders a few weeks ago, but I held back because the bike-share companies would take action (or at least draw attention to the practice) if they cared. Furthermore, I'm guessing that those bikes are fully depreciated within days of entering service. I must admit that they are kind of convenient these days, though, and I don't feel like I'm risking my life when using them because there aren't many cars, trucks, buses, or couriers to worry about.