Better yet - close the government schools and let parents and kids go to the schools of their choice.
Watch the cost of education plummet and the quality to go up exponentially.
There are few reasons to behave when students see a virulently disruptive kid returned to class after a few days of vacation (in the eyes of their peers) after threatening real violence against a teacher, throwing a computer monitor across a classroom, and/or being taken from the school in handcuffs for selling drugs in the restrooms. (Yes, those are real examples from my classes.) If there are no visible consequences for acting outrageously, why is there any need to control oneself?
However, if there is the possibility of being removed from sight, permanently, then those astride the fence will certainly take notice and think twice before following a bad leader.