Actually, I’d imagine that working as a conductor makes you more able to judge who is a chancer and who is a genuine victim of circumstances. The Welsh conductor who posted earlier in the thread said this in her posts: she uses discretion appropriately.
I think that some people must be attracted to that career because of the opportunities to finger wag and boss people around, though. I’ve met a few of those. One of the younger conductors near where I live is fond of striding down the aisle shouting, “tickets and excuses, please!”. That’s quite funny the first time around, but after the tenth time I think, hang on, I pay £14 a day to get to work on a train with insufficient seats that is often late, why do I have to be suspected of criminal activity every day?
Another conductor, who must have seen me every day for the last three years, came down the train checking tickets and I couldn’t find my monthly pass because I had loads of bags of shopping and had shoved it in a pocket. When I looked for it he said, loudly, on a packed train, “Oh, the old pocket pat trick!”
I found my pass, in one of my pockets, but where does he get off, suggesting publicly that I’m dishonest because I couldn’t produce a ticket within five seconds? Shaming me was inappropriate, just as it was inappropriate for the OP to be on the receiving end of confrontational behaviour from the inspector on her train. Why the aggression? Why presume that everybody is a liar and a thief?