There is one big problem in what you propose. What about those members that came in search for answer for a problem they have? There are those who joins this forum only to seek help in specific sections, like Mining or Bitcoin Technical Support thread. With what you proposed, they would not be able to get answers they seek, and that would be bad.
Also there are fine guides for newbies in the beginning of each section. If they dedicate only small portion of their time on reading them and not making posts immediately, they would know what to do and how to do it.
Not to mention that there are already topics which helps people improve their post quality.
New members need to read and think more before write something. That would improve everything around here.
EDIT: For those who seek to learn rules of this forum go read this:
https://bitcointalk.org/index.php?topic=703657.0