At this point the title should be changed to reflect that a singular teacher decided to score their students based on taking a bathroom break.
Shovel: Neutral-Good (farming), Uncontrolled (it’s very unlikely you can do much harm to society with a shovel)
Backhoe: Neutral/Good (efficiency), Controlled (heavy machinery can easily kill people and damage infrastructure)
Agent Orange: Bad (imprecise, damaging, disease-inducing), Controlled (considered a chemical weapon with no legitimate societal use)
So I think that more oversight should be used in order to prevent teachers with bad and abusive efficiency strategies from, for example, downvoting children for needing to pee.