Comment by TrackerFF

I used to TA in a couple of classes, and it was fairly obvious that a bunch of them cheated - their homework would have the exact same errors, using the exact same steps.

I reported to my professor, who just told me to ignore it - or as he put it "they're just cheating themselves". Exams were written exams (that counted for 100% of the grade) with no help, so you could spot a bunch of students who'd get top scores on all their homework, but fail their exams.