That just upsets me. I've been known to lock the door and not let them in. Lack of preparation for class on the part of the student also frustrates me. It's very challenging to get the students inspired about learning these days. There are too many other distractions, the most apparent being extra-curricular activities.
Academics seem to take second priority.
A related frustration is the unresponsiveness of students in the classroom. They are accustomed to learning via television where there is no response needed, so they are very reluctant to offer audible opinions and ideas in front of their peers. The relationships I've developed that go beyond the classroom. Just recently I had a student in my office whom I had not had in class, but we talked for an hour and a half about lots of things-life, vocation. I'll miss that because the students are just special people in my life.