I think if the forum became an instruction manual it would be a sad thing. The Private Message function already exists and thread divergence is often interesting, sometimes irritating but there is always the option of quickly flicking through. The search function works well but if it beats you, you can always post ...."help! I can't find so and so" and somebody will do it for you.
Chit chat makes the world go round and long may it live intermingled with the facts and debate of the forum.....in my opinion