Simon at CAMRGB HQ was on Twitter the other night mentioning that he'd heard complaints about short measures being given out at the newly opened BrewDog bar in Newcastle. He also said that one person had had a request for a top-up refused. This also happened to a friend of mine at the opening weekend at BrewDog Nottingham. When he asked for his beer to be topped up, the bar staff refused, saying 'We've been told not to.'
I'm sure everyone's aware of how weights and measures legislation affects this sort of thing, and in the end I'd say this is just a matter of poor customer service rather than a sinister conspiracy.
Having said that does serve as a reminder of a virtue of keg over cask from a stock-taker, or more particularly a pub company's, perspective. Casks are simply a lot more wasteful. Years ago I worked as an assistant manager to a guy who had moved back into running pubs having been a stock-taker for Scottish and Newcastle. This gave me an insight into how much more beer it's possible to get from an 88 pint keg as opposed to an 88 pint cask. Every now and again it's worth taking a mental step back and considering whether participation in the 'craft beer revolution' (or at least the 'un-demonising' of keg) might just be a case of 'Over 100% yield? Yes please.' It'd be paranoid to think it's always true, but naive to dismiss it totally.