As I suggested on another thread.
Anyone without a ticket should approach the guard (at Northern's instruction now), at the door, and prevent him from despatching the train until he has sold you a ticket. If he refuses, you complain that you tried to buy a ticket at the first opportunity and were refused that chance.
A few thousand commuters doing this, on a given peak hour morning, would cause network chaos through delayed trains and may just focus the minds of Northern management into pondering why so many of their passengers are not buying tickets in the first place.
Time for a campaign on twit. Any volunteers?
"You wouldnt leave the supermarket without paying for your shopping if the queue was long and you were running late. If there is an open ticket office or Ticket Vending Machine available, it is your responsibility to purchase a ticket before you board the train."
No, but I would walk out of the shop, leaving the goods behind, if the service was so psspoor as Northern are at selling tickets. Unfortunately, having travelled on the train and found a massive queue of people tying to buy a ticket at my destination, I do not have the option of turning round and going back home. I have consumed the service and thus have to pay for it. And Northern have no incentive to do this efficiently and seem happy to make people queue up for 20 minutes simply because it saves them money by not having ticket offices, or enough staff at ticket offices, or investing in TVM, or enough ticket sellers on trains or at the destination.