Yeah maybe but i still think it was a wrong way of correcting them even if that was the case.He should not have embarrased them the way he did.What if they have got a genuine reason to be late?If it was in another country,he might end up losing his job you know.
Is true what you say, he has no right to stop them from coming into the class. Are they not university students they r matured enough to know whats good for them.
His contract with them is to teach whether they turn up or not is not his problem.
On the contrary our brothers n sisters lack courtesy if they r left without being treated like animals they will behave like animals.
I think a genaral awareness lecture should be introduce to enlighten the students n the lecturers on their right n duties as well as manners in which to interact with each other