There are only three Unforgivable Curses that are punishable. It seems that all the other spells can be freely used in any situation (until someone actually killed I guess). There seem to be no regulation for such spells as Stupefy, Levicorpus or Petrificus Totalus on a fellow human.
Petrificus Totalus looks like an especially disturbing spell to me.
Neville’s arms snapped to his sides. His legs sprang together. His whole body rigid, he swayed where he stood and then fell flat on his face, stiff as a board. Hermione ran to turn him over. Neville’s jaws were jammed together so he couldn’t speak. Only his eyes were moving, looking at them in horror.
It actually feels like a torture by itself with possibility of serious injuries. And I dread to think how it can be used in less innocent situations - by a gang of teenage bullies for instance.
Still, an eleven year old nice and kind girl uses it on other child without a second thought. Draco used it on Harry without any consequences and even Dumbledore thinks it's appropriate to use the spell on a human being (right before he is killed).
The spell seems potentially dangerous and violates elementary understanding of human rights and dignity. Shouldn't such spells be somehow regulated by the law? Is there any evidences in the books that the usage of magic on other humans somehow controlled by the Ministry?