I have conflicting reports, though on average Joe is in the better bunch, he is visible, customer aware and he doesn't take crap. It his train, he is in charge
For reference a train host ended up in hospital recently he intervened after a full on brawl broke out on board, he even lost his shirt in the process. Several other hosts have had to call in the gardai to remove extermely troublesome passengers.
It shows we need a member of staff onboard, the driver can't stop to sort these things out