Uhm, this shouldn't be shocking to anyone. It's a listening device. Our smart phones do the same thing. If you want privacy in your own home, leave all the electronics off.
Heck, my smart phone has been turned off at night, and in the morning it will be back on. Is it being remotely turned on? Who knows. You can't take the battery out of them anymore either. Leave the phone in your car then at night perhaps, or put it in a little faraday cage made from a military ammunition box.
In the recent past Nest cameras were being watched by employees. I have Amazon's Blink cameras in my house, but they are only in common areas and in places where if someone was spying I wouldn't care. Anything connected to the Internet within your home that either has a camera or microphone can be a potential risk.
Electronic security in your home is a complicated process. You want cameras for security, but you also want to make sure they cannot be used against you or to spy on you. If anyone is looking for advice on home security, I will gladly assist them as my time allows.