It's amazing the "loopholes" students can find. I decided to be gracious to my Gospel of John class and allow them to turn their papers in before the end of the day, since I would be in my office until late that night. As I started the class (after I announced this), a student asked me a question about the paper. I answered it and got about 1 line out of my lecture, when I looked back at him.
He had his laptop open and a stack of books next to it that looked like John commentaries. I said: are you actually working on the paper right now?!" He said yes. Unbelievable! I couldn't believe it, I laughed so hard my stomach hurt for an hour. He was actually going to try to finish the paper during class. That took nerve!