1. Cheat could be considered something as simple as collaborating on a group assignment when specifically instructed not to do so.
2. An XE is a failing grade due to academic dishonesty.
3. Another possible sanction could be that the professor decides to give you a zero on the assignment.
4. An AIP file is kept in the dean's office.
5. An AIP file is destoyed after 6 years, or once the student graduates. Whichever comes first.
6. You shouldn't for the simple reason that the reprocussions aren't worth the laziness.