So what is a serious dose of negative reinforcement?
I am sure lots of people have seen the Kubler Ross curve.
The purpose of the strong dose of negative reinforcement is to take the person beyond the "Resistance" point and push them all the way down to "Acceptance & Regret". At this point they are now ready to begin to form new neural pathways that will allow them to change their behaviour patterns, or go sulk.

This question has been part of an ongoing conversation I have with my friend