It's probably a Belgian television news item that initiated this, was all over the news today. +1000 clips were leaked to the reporter, who found some addresses in the clips, and went to these locations to confront the people living there. They also had some Google employees anonymously speaking about the things they hear: identifiable information, private conversations or actvities... Nothing shocking really, if you are a bit into IT stuff, but apparently most people aren't.

https://www.vrt.be/vrtnws/nl/2019/07/10/google-luistert-mee/