You're getting downvoted to hell, but there's some truth to this. No one wants to ride Hotel 22 as a passenger, and homeless people on Bart is at least a small negative for ridership. Caltrain doesn't have this problem because they do fare enforcement, a ticket only gets you one ride, and its mostly a commuter train. Caltrain even lets people drink on the train and its not a problem, but it's because of the crowd they serve.