[Philip-J-Fry]

Maybe the solution is to have a randomly generated paragraph of text to read which expires in short amount of time. So you can't predict it and you don't have enough time to splice together a fake reading from something else.

[Gigachad]

The problem with any anti abuse measure is someone can create another project which does not have any of this. There are a handful of projects which can do pretty good voice synthesis right now. It would be about as easy as getting a consensus for all photo editing tools to place a watermark on the image to prevent abuse.