There is a point in the above. The world has now become WAY too intertwined for such nitpickings.
In a way, it's precisely because it's become so intertwined that the issues are worth our contemplation and discussion. A century ago, it was easy to be oblivious to some tyranny on another continent. Not our problem what "those heathens over there" were doing. Now, if the wind blows cold in one country, the people in another country sneeze.
If there were one right answer to the problem of engaging isolated dictatorships in the rest of the world, life would be a lot easier. But
Chris is right: ping pong diplomacy did lead to engagement with China. What will skating lead to in North Korea? Or is it not time yet to share the goodies of world culture with them?
One thing comes to my mind: during the time when Eastern European countries were overthrowing the Soviet-sponsored governments, one of the countries (for some reason I recall that it was Lithuania) had massive demonstrations in the capital city. I remember looking at a news photo of one gathering and realizing with somewhat of a jolt that
many of the signs were in English. Think about that for a second: English is not the national language of Lithuania. Whose attention were they trying to attract? Clearly people in several of the countries of the outside world. They knew we were out here.
I think that there are several paths for people to take when trying to improve the lot of people in a repressive country. (I'm talking about private citizens and non-government groups. Most of us don't set government policy.) Some people choose to boycott, while others choose the opposite path and opt for engagement. The most basic thing to do is convey, somehow, the idea that
we hear you; we know that you're there. At this moment, it seems next to impossible to communicate this to the general public in North Korea. But who knows? Maybe word does get through. If any people over there are listening, shouldn't they know that we're out here?