I've been lurking on FlyerTalk for about two years now I guess. So I don't know if that makes me a newcomer or not; certainly to posting.
I think it's a good thing to encourage threads to be posted where they best fit. The unfortunate thing is that they can't be moved between these separate boards. So I'd like to join in with someone's earlier suggestion that a link to the thread, once it is opened in the proper place, be added to the original thread before the thread is locked.
One thing to keep in mind for the folks who are upset about this is that most board software starts misbehaving when the number of posts starts getting unwieldy. So keeping posts in their proper place, as much as possible, will help keep performance at its peak in this the most popular of the boards.