Each to his own, but for myself I'm interested in analyzing and advocating strategies that will actually work. Whether you "think local" types like it or not, we are all in this together. A major die-off will be a complete disorderly crapshoot, and no strategy is guaranteed to get you through it. So we all have a strong interest in finding strategies that work for (almost) all of us.
I wouldn't really describe myself as a think local type, more as a do what is practical type. And right now, while less then 1% of 1% of the population is even considering the issues presented on the oil drum, it doesn't seem practical to think in a global way. While you're out there in the street screaming its the end of civilization as we know, people arn't going to listen to you. They want their McDonalds and Survivor. They will listen when the crap starts to hit the fan, but by then you are already in the middle of the crap shoot. I hope to god I am wrong, but this is my gut feeling at the moment.