It is hard to get resources to make changes. Adding users to moderate is something we don't take lightly, especially since most of you are quicker to whack things you don't like than I prefer. I could have people put things in a hidden mode, but I don't have an easy way to review those, which is a pain. Plus, I have to add you to each forum. No groups here. (crappy forum architecture).
I did spend a bit of time looking at the patterns and tried to identify some things that I can try to handle in the DB side, no front end work needed, but it's not simple.
I'll describe the problem more later, but a bit busy now. I have been trying to escalate this as work that needs to change. Part of the issue is we have only a few people that can make changes, and this is low priority. some also need good direction, not just "make less spam".
If it's too much, I'd suggest that you not monitor forums, but rather come back periodically to look at active threads and answer those. The spam filter does work pretty well, but it's after the post is made, not as it's being made.