I wonder how long it takes until the whole teaching profession just collectively decides to adopt professional pseudonyms. Would make "child at same school"-situations even more awkward I guess.
That being said I did once call my male first grade teacher "mom" so maybe I'm not a good example
We do this all the time for students that can't/won't use their legal names in school for a number of reasons.
There are quite a few lines of work where this might not be a bad idea. E.g. also Police and government employees in general.