Wilford,
I'm not concerned about a segregaters' subforum killing the main board. It could, as Malcolm points out, just as well increase message traffic from segmenters who don't follow more general turning issues. Also, don't forget that this forum is much larger than those who post. There are, perhaps, 25 people who post with any regularity and another 25 who post occasionally. However, you see threads listing hundreds or even thousands of different people who view what's being said, depending on the thread subject.
My concern is for the moderators. In order to keep trolls, spam and inappropriate material off this board, Jeff and Steve (+ whomever eventually may replace them) have to spend a fair amount of their personal time reading each and every post here. I'm a bit concerned that "sub-fora" may add more time to their personal workload beyond what they reasonably "signed up" to do.
These guys don't get paid for this, you know. 😉
M