Yes, I know why he locked it. It is a real issue, I agree. I still feel that it shouldn't impact us from reading those posts, as he did make some quite good points about conceptual superweapons. That's why I proposed a karma threshold: Established LWers should be able to access it, without the problems that emerge from it being open to the entire internet.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.