"Ticket machines can present bewildering jargon, a barrage of information and choices, as well as incomplete information about ticket restrictions," added Mr Smith.
An interesting article about how customers would rather speak to an operator instead of get their ticket from a machine as the information the machine provides is unclear and not complete
Inevitably, with valuable information comes deceptive mis-information and programme makers have to make difficult decisions about how to harness social networks.
"On Twitter you see people tweeting on various protests that have happened," Dr Azi Khatiri, an interactive producer for the BBC's Persian TV service, said. "But, as a news organisation we have to make sure what we report is accurate and correct.
