My bike had been locked to a bike rack in the sheltered bike parking area at the Howard & Paulina L-train stop. The bike rack is right behind a single person unit that an L-train worker always resides in. I asked a woman working in the unit if bikes are stolen right there where a worker is always present and she said yes. That they do the best they can to always chase away a few guys who hang around there looking suspicious. But that there's only so much they can do. That bikes are stolen from there regularly. Something I wasn't aware of until mine was missing.