You know the Apple FaceTime bug that everyone’s going crazy about? It’s a huge screwup, for sure, but at least we know it’s just a bug. Being able to call someone and eavesdrop on their conversations without them knowing is clearly a privacy nightmare, which is why Apple disabled Group FaceTime until it can issue a proper fix.
Amazon, on the other hand, offers silent eavesdropping as a feature for its Echo speakers. It’s called Drop In, and if you’ve enabled it, you should probably turn it off.