The idle speed on the newer bikes is to be at no less than 950 rpm. This is to allow for the proper flow of oil to the top end of the engine. If you lower it, you will accelerate wear, and increase the chance of premature failure in this area.
I've yet to see any hard facts as to what you say. Do you have a reference or any stats on breakdowns or damage from running a low idle? Where did you get this info from? Thanks