> thereby leaving your programs open to copying, may constitute cheating depending upon the circumstances
Did the university contact each student and request to have the student remove the repo? Unlikely given the sheer volume of repos in the takedown request.
Irregardless, the University should have measures to deal with this internally if they felt so strongly about this cheating rule.
Their rules don't state that they need to. Had they chosen to enforce their ethics code internally and take internal action against the students, they'd have been within the bounds of that policy.
That said, they didn't do that: they used the DMCA. Their use of the DMCA is a strange choice in my opinion, but is likewise valid if the repos contain original work created by the university as part of the problem set.
Did the university contact each student and request to have the student remove the repo? Unlikely given the sheer volume of repos in the takedown request.
Irregardless, the University should have measures to deal with this internally if they felt so strongly about this cheating rule.