In my area we have those bikeshare bikes. I come across broken ones all the time. I have retrieved a few from lakes,creeks and fields and put them in a concentrated location and reported them to the company. After over a month, the company has not picked them up.
One of these bikes has had the lock and other parts cut off. It is impossible to purchase a ride on it. It has obviously been stolen at one point. It is in pretty bad shape but still rideable.
If I rode this bike on day 1, would it have been a crime? If I ride it after a month of not being picked up, is it a crime?