I wonder just how much theft there is, or how much attrition there is for the bikes, through damage, vandalism, etc.? I saw a picture \of what was clearly a Citibike spray painted black, parked on a street somewhere. Back in the earlier days of the program, I saw guys going down a line of bikes pulling on each one, and riding off when they found one not properly locked. I wonder what they did with the bike at the other end? Who knows, maybe they parked it at another station. At the risk of profiling, I still see kids on Citibikes who don't look like the sort with a credit card and the money to spend. But who am I to judge?