Not only do I not agree that we need a moderator, you couldn't moderate this group if you wanted to! Usenet has rules and you can't convert a non-moderated group to a moderated one.
You'd have to have a new group created, probably rec.woodworking.moderated, and there are more hoops and votes and nonsense to jump through to get that to happen than is at all likely to happen. You need to find several moderators, and then hope that anyone from rec.woodworking will actually post to rec.woodworking.moderated, which is unlikely.
It's easier for you to just learn how to use a killfile on your own.