Withdraw all US forces (and the statue) as well as all economic, military and any other foriegn aid to South Korea. Let's see how the "activists" like living in the utopian, North Korean variety, communist state.
Get a friggin grip. I am not real happy with the attitude of a large segment of the SK population. However, most are on our side, almost all favor Democratic government, and allowing them to fall under the dominion of NK is absolutely as preposterous a notion as I have ever heard. You want Kim Jong-il to get his hands on 100 nuclear WMDs? How about 1000? The quickest way to do that would be to give him the immense human and industrial wealth of SK. And aside from the practical considerations, no mere insults could ever warrant the punishment of life under the present NK government.