I don't see how it could work, but I wish him luck.
I think his previous South Korean protests are good.
_Some_ South Koreans do need to be shamed about indifference towards the suffering in North Korea. Stop treating North Korea just as a resource and cheap labor opportunity for Chaebol, think more about what a horrific death and torture camp the whole country is.
Actually it is a combination of sanctimonious anti-Americanism and cowardice, the cowardice which would make them happily pay Kim Jong-il 'Dane Geld' to not cause trouble and hold back poor N. Koreans.
They spin it as standing up to 'American bully' and pursuing proud pragmatic diplomacy. These same people could not stand the days of authoritarian military rule in S. Korean past, which was practically a heaven compared with the N. Korean regime.
Such sanctimony and hypocrisy.