I have a theory about the predilection of Birthers and other kooks to leave their rants on inactive or dead threads. I believe that subconsciously, they realize that they’re about to type something mind-bogglingly dumb and post it on the Internet where everyone in the world can see it, and so they’re torn between two conflicting compulsions: to blather about Birtherism, and to avoid embarrassing themselves. So they deal with the disconnect and cognitive dissonance by posting at the end of a thread that comparatively few people will read, preferably a day or more after the blog has moved on to newer subjects.

This way, they get the obsessive’s satisfaction of having the last word, and also mitigate the conflicting need to avoid embarrassment at the sheer stupidity of that last word.

That is my theory.