All things that are not needed.

Checking tickets can be done by not allowing anyone on the platform. Or world best practice is random checks and large fines if you are caught without a ticket.

Breaking rules is tricky. There is some need for that, though there are options, though in the end I will grant you this.

Trains should never serve food or drink. Passengers can get off the train at a station when they need that, and get on the next train. Space used for the food and drink is space that could be used for more seats. There is a reason all railroads have been trying to do away with food and drink service. It is considered bad practice everywhere.