When asked what he thought of this proposal Former US Ambassador Robert L. Gallucci said he would not take it off the table. He did say however, that the DPRK is already an international pariah and he doubted it would really effect China's propping up of the DPRK anyhow.
I personally think this is a bad idea since I doubt South Korea would be able to take care of 23 million North Koreans should it miraculously gain control of the North. I also doubt Russia or China would greatly change their support of the DPRK even if such a policy were accepted by them. But what do NSers think of such a proposal?