I see your point. But consider the following: these numbers are for the students that admitted cheating. There was a significant number of other assignments for which I suspected cheating but I did not have enough evidence. So, I erred on the side of having false negatives in the accusations, rather than false positives.

Now, if you are teaching a class where you have some suspicion that half of the students have cheated, one way or another, the attitude changes. I wish I could be a cold, rational, emotionless professional, and ignore this feeling altogether. Unfortunately, I am a human. And I felt that I am teaching a class full of kids that come just for the grade, and not for learning.

And I am kind of disappointed that nyustern still demonstrates this grade-seeking attitude: He learned in the class, he appreciated my attitude in the lectures but his main complaint was that I was not approachable outside the class, and outside office hours? And that, out of all things, did not return his smiles? Hint: at 5pm, after 11 hours of work, 3 hours of lecturing, I am tired, mentally exhausted and I want to go and get some rest.