Reports start out unhandled, and are then either marked good, marked bad, or no moderator ever handles them and they stay unhandled. When a report stays unhandled, this does not mean that no moderators were available to look at it; rather, it means that several moderators looked at it, but none of them was sure whether it should be acted upon or not. A report that stays unhandled can be thought of as "soft-bad", since no moderator positively thought that it warranted action.
But problem is if local board has no moderator than it's very hard to determine that post are bad or good. I this that's why moderators leave them unhandled. First need assign moderators for local board. At least they can delete spam post.