I upvoted you before you went grey because I do think that's a salient point, but I would guess you're being downvoted because the suggestion that the NSA will

I upvoted you before you went grey because I do think that's a salient point, but I would guess you're being downvoted because the suggestion that the NSA will record the activity in your home around the clock is considered excessively paranoid. These devices usually perform hotword detection locally and don't start sending data up to the cloud until the hotword is spoken, at which point they capture only a few seconds of audio. Beyond that, there's really no difference between Google Home and a Nexus phone. If Google wanted to record all of the audio around you, they're already equipped to do so for like 50% of the population that runs Android (and there has been speculation that intel agencies are able to remotely activate cell phone microphones and listen in).