@warblersrule: The ethical considerations are more of an issue for me than the logistics. During the final exam last semester, my TA and I were like undercover cops. He had the photo roster up on his laptop (there were 50 students), and I had the access log up on my phone. It was almost comical. “Someone just logged on. Is that the guy who just went to the restroom?” “Here he comes. Yes, that’s him.”