Issuing the warning is just as much a corrective disciplinary action as expulsion
Well no, they aren't even close to being similar and I would be interested in hearing how they are similar when both give very different results to the student. One stays on the students record for the rest of his life while the other is never put on record and gone after the student graduates. While one has you put in front of a board and possibly kicked out of school (while put on your permanent record), the other is simply an email given to no other besides the teacher and the student.
How exactly are those similar?
As for your experience let me put it to you this way--I don't hire a cement mason to wire my house just because he watched an electrician at every construction site. These are separate professions it is just the same as hiring a lawyer to teach and it seems to me your credentials don't exactly parallel those of a general contractor in construction (let's say a law professor trained to teach and knowledgeable in both fields efficiently enough to convey the concepts) they could likely run circles around the both of us. Every specialty from the builder to the teacher to the guy at the pizza joint is usually more specifically trained on the laws that effect their fields directly(building codes, state standards for testing and student behavior, health codes, employees rights and worker safety etc) than the entirety of the law in general, you give no other profession credit for their own regulation with your "I'm doing law so I'm right all the time" drivel.
Well no, the credit I give myself is someone who has worked at a University (i.e. School just in case you struggled with that) and someone who has dealt with issues of cheating in instances such as this one. You have nothing to say to that so your best excuse seems to be just either ignoring it or discrediting it, either of which continues your only argument which seems to be diverting the topic to something else.
There are people on this thread who have given reasonable reasons for their argument. Fair enough. You, on the other hand, keep arguing these topics that are laughable at best. Due Process? Public funds?