When people complain about being tracked by Google and loosing privacy, they get told that they should simply not use it. If Google Classroom is used, students/parents are effectively given no choice in the matter. If the Google decides to ban students gmail account (because students name does not sound real enough or without explanation), the student is f-ed. But mostly, my primary reason why not to use it in school…
Are you suggesting that my about@mycompany.com email address could be blocked because 'about' isnt a real name?
Google has never banned hosted gmail acccounts, and I can't see how or why it would.