Why move the aiming threads? Why not address the real problem, those that are there only to disrupt and offer nothing of value? They are the problem, not the topic. If those that don't want to read them stay out of them, no problem.
Why, Neil? The answer is that you are right, the best answer would be to insure that the poor behavior was contained, and minimized.
Unfortunately, that isn't the easiest thing to do. Moving the aiming threads to their own sub-forum will at least segregate those who refuse to act appropriately.
As much as I don't like the idea, it has become the right thing to do, for the overall sake of the forum.