Re: Instructors of low rank
I can't imagine this happening in our dojo really. I think a better solution would be that the easy to reach lower rank is asked to be responsible for opening doors and making sure the dojo is locked up afterwards, and asked to hand the class to the highest rank that happens to show up.
That said. if my teacher did ask a lower rank to lead a class for some reason, I'd shut up and train and show a good attitude about it to support the person leading the class. It's sensei's dojo, his rules.