There in
launchpad.net they have an useful feature in the "Answers" section - when a new thread is posted the software firstly does a search on a keywords from the topic and gives you found threads; you are proposed to read them. If you want anyway to post the thread then you can go.
That's a good kind of posting I think. It could prevent our monsters

from wasting time to answer all the same answers.
Is it possible with this SMF forum software?