If you want to play good cop bad cop, technically they should be skiing in control.
These people wouldn't know control if it hit them upside their head.
Yes, I understand that the person below you has the right away. However, this does not mean they need to do turns across the entire trail that leads directly to the lift. Especially when their motions are completely unpredictable.
Perhaps the instructors should use only 80% of the trail and leave the sides open for those of us who want enough speed to make it to the lift without having to unstrap our bindings.