Ive seen the pavement up front and personal (didn't go over, amazingly. Stood on it's nose for what seemed an eternity) in a Stinson 108-3 doing a BFR. He had replaced the awesome, almost not there, Cleveland drum brakes with disc. I've crawled out of an upside down Supercub trying to teach the new owner. Came equipped with Alaskan brake boosters.
As an instructor, I can overpower all of the controls except the brakes. When the student stands on the brakes, I am just along for the ride. Yeah, it sucks.
My Cub will not quite hold in place for a run up, on 31's. For me and the teaching environment: perfect!
I spend an hour with all newbies taxiing and turning, feel the brakes, and where they are. We never leave the ground.
I tell every one of them, as I was taught, if you need the brakes, you already F'd up. 98% success rate so far.
Years ago, I would climb into the Twin Otter right seat for left seat checkouts. I would have a very heavy yard stick in hand. I would brandish it and tell the new guy "if you touch that F'n tiller for anything other than parking the airplane Ill beat the living **** out of your hand with this! Your hand stays on the yoke until you are ready to park!". With differential beta and reverse, easy to control in crazy crosswinds. Just had to teach the right hand what to do.
We still had an average of 6 runway excursions per year, as guys would get anxious in a cross wind, quit flying the airplane and try to drive with the tiller.
At least they didn't go over.....
Tom