Howdy,
the idea is not a bad one. Although there could be a minor drawback with this method.
With many people having many different types of questions asked in one thread, trying to answer them is not an easy task. And in my opinion, the larger the thread, the harder it is to find the questions/replies.
These are simply my takes on this. Try out your idea, and see how it will go. If it works, then why not =).