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so Mr Main found it amusing enough to post it on facebook, if he was so angry and injured why didn't he go straight to the police. If he had thought about it, he wouldn't have been mouthy to the ticket inspector in the first place. I don't see the ticket inspector as being a jobsworth, i see him doing his job.
Just to add, two youths stabbed a conductor several days ago, whilst this is obviously not connected, perhaps they were mouthy and had no tickets, so he rightly objected, and got stabbed for his pains. From what i can gather he wasn't badly hurt, but this scenario is the tip of the iceberg.