Being pushed and inspired is totally different than down right physical abuse.I had a coach in High School who was similar to that - he's still the Head Coach here and he did everything short of gearing up, but everybody I know loved him. He was able to get maximum effort from everyone, when your tank was empty he taught us that we could always give a little more.
I can see using a little aggressive actions, because they are all padded up, so you can't just tap them on the shoulder, but to mow them down??
If those were my kids, I think I would have been knocking on his door that night.
You can teach how to power through with a sled.