A while ago we cleaned up the beginners tag, but it has returned.
Is now the time to request it gets added to the black list (after another clean up)?
Yes, since it's meta tag. In fact, beginner is explicitly mentioned in the blog post. Although I would suspect that the clean up wouldn't be that much cleaning up. I looked at the questions and most and otherwise appropriately tagged. Perhaps it could just be obliterated rather than a full clean-up.