Expelling cheating students can serve as a warning and encourage students to study hard if they want good grades.
But expelling can not solve the problem and will have bad effect on students' future.
How to describe the advantage and disadvantage in English?
In my university, if a student get caught in the exam, he will be punished. He won't get expelled, but he can't get his degree certificate. There's no difference between expelling a student and revoking certificate. A person without degree certificate will not be hired by the large company, especially government agency.<o:p></o:p>
A law is passed and enforced in Chinese College Entrance Examination this year. The cheating students will be in jail, up to 7 years. It’s more serious than expelling.<o:p></o:p>
All I can say is, dishonesty costs dearly.<o:p></o:p>
(I’m not sure if you understand what I say.)<o:p></o:p>


