Also, I've experienced (with witnesses) Alexa interjecting her opinion about which movie we should watch. Alexa was not in use, and no one said anything that sounded like her name.
I have Alexa for music, but I disconnect it completely between uses.
At this point, I'm also considering getting a burner cell phone for everyone who is not a close personal friend. My personal cell phone will have a new sim card and phone number, with a new name attached to it, and my VPN downloaded to it.
I am practically rabid on privacy issues. Even though I am just like most people - not a criminal. I just don't think the government and a whole bunch of companies should be privy to what I am doing, saying, reading, watching, etc., without my permission.