It could be a part of a whole policy, I know that schools that use Assertive Discipline can use it, but it is balanced by names of children behaving well on the board too. The aim is not to end up with anyone's name there except well behaving children's. There should be clear rules and if you break them, you are given a warning, then a consequence. It's a series of consequences that get more severe if the child continues the bad behaviour. Most teachers use a book for keeping notes of names, though, not the board, which is too public. The consequences work in sequence, and at the end of the day or session, you start again, so it's a fresh start.
I am not a big fan of Assertive Discipline as although it seems logical, and in a sense it 'works', it relies too much on rewards and systems, not on natural respect for one another. It is only a useful tool if the teacher has good discipline in the first place, and if the curriculum is stimulating enough that the children don't need to mess around. In which case, the Assertive Discipline just about becomes worthless. However
it is really, really useful for new and less experienced teachers, or for difficult classes with challenging children. I've known schools where they follow it, and most teachers never, ever give out a consequence.
You do need to get the whole picture first.
As for it being humiliating, I don't think it's necessary, but that doesnt mean that it's the big deal you see it as. It depends how it is used, how often, and how the children feel about it. Without knowing the whole story, or what the teacher is dealing with, its' difficult to comment. IN an ideal world, no teacher would need to resort to such a measure. But in reality, teachers come in all shapes and sizes, and like parents, none are perfect.
Except me of course.