In the last few days some of the forums have been plagued with advertisements for magic and tantras and other bullshit.
All of these coming from new posters who come and make about 10 threads with these advertisements.
And while mods are usually fast banning the user and removing these, not even mods are 24/7 here.
I think that, the same as the with the link limitation, posters should not be able to create threads until they have 10 posts. There's plenty of threads where they can post if they care about the forum life.
How this helps:
-advertisers and bots, even if they do make new accounts, will not be able to make new threads, which are seen by everyone
-advertisers will be forced to throw their ads in other threads which already exist, and many won't bother or their posts won't be so visible to people.