My Opinion on Teachers who think they are above the bell

Ok, so I think we've all head these jerk teachers every once in a while that say something completely retarded like, "The bell doesn't dismiss you, I do." now I don't know why they say stuff like that. They can keep us after school anyway, why are they trying to make themselves sound important? Not that teachers aren't important but I think they say that, because they just want to pick on people. They don't care wether they can keep us after school or not, these egotistic lunatics just want to let us know that they're better then us. So we go along with it, to make them feel good about themselves, and because we have to. Have you ever noticed that teachers don't use their so called "power" to dismiss us early? I guess the teachers have to win sometime..... so there you go teachers-that-keep-us-after-the-bell-to-make-themselves-feel-better, feel good about yourselves. Because a lot of people don't see you the same way after you've done that.