I made a similar suggestion a while back. With some much appreciated effort, as a work-around, Kiwi Flyer compiled a list of relevant threads for OZ-NZ. See this post:
http://www.flyertalk.com/forum/showthread.php?t=321579
I think it would strengthen the Destination forums if more of the location specific DiningBuzz and TravelBuzz threads were moved to the relevant region. Some people less experienced with FT may not even be aware that there are forums for the various regions. Seeing these moved should get more traffic into those forums.
Similarly, the LocalTalk forums also overlap with the Destination forums; for the most part the Localtalks seem to be very lightly used. At least for the US airports, consider converting these forums into threads under the appropriate Destination forum.