Pretend that you want to sell chocolate to everyone at school. You are making a lot of money because everyone is buying the chocolate from you. Then you find out someone else is selling chocolate too so you are not making that much money anymore. You have a choice to compete with them or just mess them up so they can't sell chocolate anymore.
The teachers find out you're selling chocolate so they make a rule that you can't sell chocolate. So you beat up the teacher and show everyone what you did to warn other teachers to not stop you from selling chocolate.
Chocolate is banned from the school so the principal can't regulate the sales of the chocolate and generate tax revenue from it so the school can buy new books. The principal is the one who banned them in the first place.
Chocolate = drugs
Teachers = police
Principal = the government
