I don't think this is just a ML issue. Any device with a mic and connected to the internet could at any time be updates with new code that send audio back outs

I don't think this is just a ML issue. Any device with a mic and connected to the internet could at any time be updates with new code that send audio back outside of what is needed for ML. I think that issue is much bigger than just training ML based off real world data. Laws might give you some recourse if you can prove this is happening or not. But really we need to start thinking about ways we can ensure the entire stack is under the users control. I have said this in the past. Free software and open sourc movements have worked decades to open up software and hardware for greater transparency and user control. Yet within a few years we have wiped that out with all the closed hardware and software we happily hold in out hands and place in our homes. We need more open source hardware and software projects offering alternatives to these systems that have become a daily part of our lifes.