If a person is not literate, and flat out refuses to write (or is simply incapable of writing) to his students in proper English, then he should not be teaching English.
I expect such a person to be able to understand your logic.
He should be fired for stealing the school's paper.
The school system be fined for not filing as a 501(3)(c) public advocacy group seeking to influence federal legislation, and should be required to pay federal taxes on its funding for its attempt to influence federal legislation.
I meant of course "I ^don't^ expect such a person to understand your logic...