As its true that Supervisors in some instances have taken advantage of residents, something should be done and this is as good of an option as has been proposed in the last many years that I'm aware of. 

While this won't fix a supervisory issue that's purposefully predatory towards a resident, it will help those supervisors who have forgotten about rules and ethics. 

A 2 hour, or 10% of a Supervisory credit hours being dedicated to supervision requirements and the related supervisory ethical issues sounds like a small and appropriate ask. 

Any reminder that supervisors are to operate ethically and correctly would be appreciated.