Although I'm still struggling with the justification for releasing the details of what's working a particular train*, I can't think of any reason why it shouldn't be made available. I don't know exactly where this information would be extracted from, but certainly in TRUST we can't see anything like details of passengers requiring assistance, reservations and the crew's phone numbers - even if this is available in the original source of data, I'd like to think it'd be filtered out!
* - One reason given so far to possibly justify this, is to provide the ability to see whether a service is short-formed or not. I don't know how the information is updated if a unit's nobbled off its booked diagram to go and do something else, or when Control are trying to scratch together a diagram from other bits and pieces, but I suspect (as Ferret suggests) that, in these cases, it'd take a little while for the system to be updated if everyone's busy trying to sort things out, so the data wouldn't necessarily reflect reality until it's too late anyway. How do the systems cope with reversals too, to be any use at indicating which way round a set is formed?