If you have been in a lecture hall in the past year, this sight might be familiar. You look up at the class and there they are. Students with their phones out. Either taking a picture of the question slide you just asked or video recording a solution.
Is this bad? Honestly, for me, I don’t mind when students do this. There is only one aspect that makes me a little cautious. Often I will use questions and practice problems from the textbook publisher. For instance, the awesome Matter and Interactions physics textbook has some really nice student-response multiple choice questions. If students take pictures of these questions, they could possibly share these online. That could be a problem.