There are lots of effective ways to fix it, policy wise. Admins could rate limit accounts with fewer than 100 posts to one new thread every hour. Admins could create a Newbie section where accounts with fewer than 100 posts (or some amount of time on the forum) could exclusively post. That's how bitcointalk.org does it. Our problem is that nobody is watching the asylum and nobody cares. It took forever just to get the captchas.