I am very firm when explaining my cheating policy on day one of class. I tell them that this explanation will be their 1 and only warning. If I see or suspect cheating, I will say nothing. I will walk over and politely take their test/quiz. If that happens they know why and they know their grade will be a zero. I tell them that we will NOT discuss the issue. I will not monopolize the classes time to discuss it. The rule is the rule and they need not even go to administration. I do explain though that as the instructor when I am walking the room that I am NOT in between students so I have no idea if they are talking about meeting up after class or really asking each other the answers to a question. If it appears to be cheating then I consider it to be. As for eyeball rollers, I tell them to let me know in advance that they tend to look around the room while thinking about an answer to a question. I tell ALL students to keep their answers to themselves as assisting with cheating by keeping their answers open for the taking is considered to be cheating as well and may earn them a zero for a quiz/test too. This usually leaves the actual cheaters without a means to gather information from someone else.