The North Koreans that tourists see pretending to do things are not dumb. They know their situation -- they know they live in a repressive state, and that they are instructed to act in a certain way for a reason. An actor knows she is acting. Piracy of South Korean music and TV shows is rampant; iPads and smartphones are common; even skinny jeans are a popular fashion accessory. To reduce these people to stooges is not only to patronise, but to dehumanise.
That makes the move to open up 3G internet to tourists a brave one for the regime. Ordinary people might not get access to the web, but they can see something if you're standing next to them, holding it in your hand. Google Earth renders of Pyongyang saved to a MacBook were a big hit in 2010, as were the lyrics to Pulp's "Common People". Who knows what the they might think of Gangnam Style's tongue-in-cheek satire of nouveau riche South Koreans? The more people engage with North Koreans outside the paradigm of the regime, the more the illusions wavers. Nobody saw the fall of the Berlin Wall coming, but it had been coming, bit by bit by bit.