Applicants who went to the same highschool but have different grading scale on their school report

While I agree with the above comment about the many variations in grading across US schools, if I understand the OP’s question the issue actually being addressed is submission of a fraudulent school profile. Will an AO notice that a school has submitted different profiles for different students?

If a school GC is submitting fraudulent information and that is noticed, couldn’t that school get blacklisted all together?