At least, sometimes they do. A few of my students last semester and this act as if they are in charge of the class. They take umbrage at the idea that what the Instructor (me) says, goes. In my opinion, I am not a difficult teacher, nor do I expect unreasonable things from my students. They, on the other hand, tend to think that I am an unrealistic slave-driver.
This past Monday, one of my students claimed that I had said something in class in advance of the test they took last week. I had said no such thing, and when I stated that, my student had the audacity to argue with me in front of the rest of the class. The student in question wouldn't even back down when several of her classmates told her she was mistaken.
I have a suspicion that the attitude I perceive in my classes is the result of years of students being coddled and pandered to in the education environment. Parents don't help the situation when they march to school and attack Teachers and Principals and threaten legal action if their little Johnny or Susie isn't "treated better."
In short, it's time for people to grow up. And that goes for the kids, too.