I understand where you're coming from. On the other hand, there's a lesson to learn from the teacher's point of view as well. We always need to take a step back to understand the weakest links in security. A small piece of electrical tape or maybe even a strategically placed VHS cover could solve the issue. Hopefully, this hadn't happened again.

It also comes to: should a teacher "trust" their students not to be intentionally disruptive in interesting ways? Now I wonder if I should similarly trust my users (who are co-workers who are at least getting paid to not cause disruptions)...