Sorry while that concept is a good idea, I have been told this will never be done because it would open a window for abuse (by forcing such errors). Same thing as unplugging the internet.
I am going to conclude by saying that if you are frequently crashing or disconnecting. You have no business playing Competitive at that time. Instead, working to troubleshoot and resolve your issue should be the first priority. Blizzard penalizes technical malfunctions to help enforce this philosophy.