Maybe someone should tip off Channel 4's Dispatches. As most journalists don't use Northern they don't get the same attention which GWR, Southern and Thameslink get.
Tongue in cheek though I'm sure your comment was, this journalist uses Northern all the time. I know many of my colleagues do as well.
Unfortunately (sort of) I've never experienced this myself, and don't know anyone who has, so I can't do anything with it. I hope someone finds a way of giving them a kick up the backside though, they need it.