While a lot of people might simply refuse to believe they did anything wrong, get rather angry, fail the attitude test, and refuse to pay the penalty fare - then get into more trouble, almost deservedly so, I do think there's one issue that perhaps leads to more of these incidents occurring;
In order to try and avoid conflict, many RPIs (you might even argue the majority) seem to give people the impression that all they need to do is simply pay the PF and then appeal after - even when it's clear the appeal will fail. They do so to avoid problems and send someone off seemingly happy that they might still get their money back.
But, at the same time, presumably to also avoid conflict, RPIs don't appear to want to make it clear just how important it is to accept a PF when refusal will quite likely lead to a prosecution. At the very least, it has now put the passenger in a situation where there's now a big problem that isn't going to go away.
Yes, we've seen some stories where the TOC later backs down, but usually the outcome is a hefty out of court settlement.
I don't disagree that some people bring this upon themselves, but would say that a lot of them really don't understand that when they say no to a penalty fare, this is what is going to happen.
Understandably, if they DID know, it could go one of two ways; They change their mind and accept the PF, or, they get even more angry as they now feel that it's the RPI him/herself that is prosecuting.
And so I can't see things changing.