I for one am one of those that's getting annoyed with the unceasing thread duplication. For a small game this is no problem, for DF with almost 300 pages in the suggestion forum, this is a heck of a problem because (1) good suggestions and debated are drowned, and (2) this forum is not ultimately for our discussion, it is for Da Toad to find (and re-find) good suggestions, and all noise is counter-productive.
Do not ignore this or wave it off, this IS a real problem here.
Moderation has been suggested before, even by me in a form or two, but it's really not a good idea. I've had as many bad experiences with moderators as I have with others, and Toady's the only one I trust with that kind pf power--myself included.
These forums remain remarkably pleasant and self-sufficient, without additional moderation.
In general I agree with SHB, and would like to add that moderators always risk becoming pricks. The best moderation is self-moderation. However, we need to HELP instill that, and I have given several suggestions to this end previously.
The most recent is my thread
"[Forum] Request mandatory prefix tags to posts in suggestions forum" where I suggest that all posts in the suggestion forum MUST be affixed by a tag (from a drop-down list or from an input box (both are available)) which will be prefixed to the topic in the forum. Toady replied there in general favour of the idea, and suggested back that sub-forums might be easier to implement.
It was in reference to this thread that Capri said:
What about sub-categories within the suggestions forum?
If people aren't going to read the rules atop the forum, obscuring places where they should post would be bad.
Having visible "MAGIC", "TRANSPORT", etc threads, right on the page, would be slightly better. Visibility is the tool we need to employ.
Another suggestion there was when n3wbs make threads there will be an auto-search before they can actually submit.