[ReggieJJJ]

It strikes me as rather odd that Mozilla would be involved in such a dystopia extending enterprise. I realize that it is unlikely that not doing this work would not prevent it from being done at some point, but it seems like a worthwhile choice not to engage in it even if it just delays things long enough until regulations, laws, countermeasures, or even technology solutions can emerge, can catch up, or be developed.

[icandoit]

Mozilla has done some work on text-to-speech and the other way around too (I think).

[https://github.com/mozilla/DeepSpeech]

Not so surprising that they want to stay on the cutting edge. The best way to shape the future is too invent it (misquoting Alan Kay)

[luizfelberti]

Would you rather train text-to-speech technology based on conversations your television eavesdropped on, or with a collaboratively-built open database of voluntarily submitted content?

This is the perfect exit for precisely the problem you're pointing at: if the data is open it doesn't need to be massively harvested to make this work, and you can run the text-to-speech engine entirely offline on the device.