There are a lot of comments, and most of the constructive things I've wanted to say have already been said. Panos, I think your conclusion is the correct one -

There are a lot of comments, and most of the constructive things I've wanted to say have already been said. Panos, I think your conclusion is the correct one - and you should stand by it. I came to a similar conclusion (different setting) about cheating, and whether it's worth it to pursue it. In more than just teaching, switching strategies is often more effective than enforcing the original strategy. I hear you're a good lecturer - take pride in that. There aren't many, really.