Not just that but also the solicitor is likely to make them very much aware of the consequences of their behaviour. I suspect that tfL takes quite a positive view on this as it meets their objectives (disuasion of fare evasion) without having to go to court.I also wonder whether TfL knowing that people have paid £1k+ for a solicitor feel that in itself is a sufficiently high penalty. It's probably much more than the fine and court costs that some would have to pay if they were found guilty in court.