Some young people have way too much time on their hands, that's what it is. They won't be thinking about what bus is parked revenue inactive at a given depot when they'll have to worry about a job, expenses, family, and so on.
Either that or they'll grow up to be one of those weird old foamers in their 50s from the museum train rides, one of those dudes who doesn't wash, works part-time as a cashier at Western Beef, and still lives with their parents.