Of course I think theres something wrong with it. I just don't think its enough a reason to make it illegal.
It isn't illegal. But it can and should (IMO) result in the loss of the teacher's job.
A boss not allowing a person to get a promotion, or a teacher not allowing a student in a university because of personal relationship issues are just signs of an incompetent boss and teacher.
Yes. And therefore they shouldn't be in that job.
I go to college, teachers like students more than others and grade them easier all the time.
Those teachers shouldn't be in the job either, if that is true.