Absolutely, many students feel they should be treated differently during class. I tend to be sure that all students are teaching me as well as me teaching them. Then the class is not only for them but for the instructor as well. We are all learning through the process of the course and not one instructor can know everything including a 23 year instructor. Challenging the instructor is something all students should do, for the instructor to allow the challenge opens them to be a well rounded person.