Ralph Rose published a paper that explores ethical issues in the use of disfluencies in automatically generated speech by AI agents. The paper proposes an approach for deciding whether such uses are ethical or not in system designs for educational purposes. See the link below for details.
Ralph L. Rose. (2023) Ethical Considerations in the Use of Disfluencies in AI-Generated Speech. In Proceedings of the 15th International Conference on Computer Supported Education – Volume 2, 128-135.