How many threads should I be allowed to make in one day?

I think there should be a limit on threads created. So far I've seen threads created from other threads to cover a topic people are already discussing in the threads where they made the same exact posts. My theory is that so many threads will exist that tangent threads will create a parallel forum, much like that of those Facebook games that have sequels. I didn't want to run a online restaurant twice! Discuss.