There is no reason to allow opening thread by newbie. Maybe only in help and beginner section, where they can ask for any help or answer to his question.
They need first to read and learn. It will be easy to boost his rank if they understand this forum.
I don't entirely agree with this. In fact, there is a newbie (his rank was updated to Jr. Member now, here's his profile
Husna QA) in my local section who started a contributive thread to our local section (Indonesia). But I do understand that there are many newbies who created too many unnecessary threads. Which is kinda interesting, how come there are so many newbies that do that?