A few points on both sides of the argument.
I'm wary of stories like this in the media as generally they are very one sided. As railway staff, we constantly see people on trains and at stations in what can only be described as absolute states. Personally, I have only had problems or had to intervene in extreme cases where an intoxicated person is behaving in an abusive or downright dangerous manner in the railway environment. As much as I am keeping an open mind, I am struggling to believe that this man would have been refused travel unless he truly was abusive/a danger.
The other side of this is attitudes from other railway staff that I have personally witnessed towards drunk passengers. We work in public transport, people who have had a few drinks are incapable of driving and should always be encouraged to catch public transport. We have a duty of care to the reasonable drunk people (99% of them are absolutely no problem at all and generally are pretty happy if not mildly irritating at times
). The way some staff talk about or treat passengers who have had a few drinks is disrespectful and unnecessary in fact, I've witnessed verbal conflicts that IMO have been largely caused by a member of staffs attitude towards the passenger. I've personally experienced a member of staff trying to goad me when I've had a few (few as in ever so slightly tipsy) drinks and it seemed that they were trying to provoke a reaction out of me for absolutely no reason.
Like I said, I personally feel that there is more to this news story but I do think both sides need to consider how they act.
Passengers having a drink need to try and remain capable and not in a state that makes them a danger or a nuisance on the Railway when returning home.
Staff need to bear in mind that one reason for using public transport is to get back home after having a few drinks and we have all been there so try and treat people with the respect they deserve.