In real life, excessive overspeeding can result in aircraft damage.
However, in IF, even if you go at speeds which would destroy the airframe, it only gives violations.
The idea here would be that (on the Training and Expert servers), excessive overspeeding would result in the failure of one of the control surfaces. Of course, the speeds would be different for each aircraft. A violation would also be given.
I think this would add more realism to the Training and Expert servers. This feature would not be active in Casual, to keep the Casual server casual.