[http://edition.cnn.com/2015/05/21/asia/north-korea-spies/ind...] > Spies and human intelligence play a big role in maintaining Kim Jong Un's regime.
NK "does not care" about security measures at SK borders.
[http://www.scmp.com/news/asia/article/1329421/north-korean-s...] > Nearly half of all North Korean spies arrested in South Korea over the past 10 years entered the country disguised as defectors, said a South Korean lawmaker on Friday.
SK "does not need" to engage in reassurance countermeasures because of the population.
[https://www.theguardian.com/commentisfree/2017/aug/09/south-...] > Residents of South Korea who have friends abroad often share inside jokes about how outsiders are way more alarmed than everyone here, who would actually be wiped out if Kim Jong-un ever ordered a nuclear attack on this country.
https://medium.com/insurge-intelligence/the-pentagon-is-buil...
I know the above sounds kinda hyperbolic, but there is a lot of substantiated stuff in there that doesn't need much extrapolation to have the potential to go reeeeeally bad at, well, the flip of a switch, political or otherwise.