Anyone introducing a harmful agent into the school which results, or may result in physical problems relating to breathing or clean air shall be suspended and referred to juvenile court. People come to school expecting a safe, friendly environment. Some exposure to harmful agents can be life-threatening. Causing someone to sneeze, cough, choke, or suffer skin or eye irritation isn't funny. Neither is going to court to defend such actions.
Students may not be in the computer room alone at any time.