That is a DAMN good idea. But IMO, the 'start new thread' option should just be flat-out eliminated for users that are on probation, and users with under 20 posts. That way it's a punishment for the troublesome members (as well as a blessing for the rest if us), and it helps to force newbies to run a search, or at least browse a little.
True Story! I love this statement "I searched but......". My ass they searched. I often wonder how lazy they must be in the real world.