They went through a period a while back where they were very strict about this - to the point where I was regularly being refused railcard discounts on board because some staff at a certain station liked to
take extended cigarette breaks "carry out essential station maintenance". Many RTVs were received for that!
This seems silly all in all. I agree with the OP - perhaps I've read too much of "disputes and prosecutions" but even though I
always pay my fare, I feel much more comfortable on Scotrail than I do traveling in England because I know I won't risk prosecution for an honest mistake. Although, I am one of the vast majority for whom it would be an honest mistake.
But then, this all seems a bit weak. It only applies (if the article is correct) in situations where passengers claim to have boarded at a station where they did not board in order to secure a cheaper fare. In which case, I can't imagine very many of these will be issued
Imagine - someone gets to the barriers at Queen Street and asks for a return from (unmanned station) Carntyne. What evidence is there to the contrary? It's a perfectly reasonable origin point. They surely can't issue this fare without some evidence to suggest that they could not have boarded at that station, which would probably only be the case if there was a revenue blockade at the station in question.
If the article's not entirely accurate and "buy before you board" will be strictly enforced for all, you're going to have a problem. I cannot believe how many times I've been refused sale of a ticket before boarding a train - being told to get it on board! (Hamilton West being the biggest offender, albeit this was many years ago). In many cases, leading to free travel because there was no other opportunity to buy! :roll: