[hammock]

We can argue about the definition of covert, but Amazon Echo does allow others to somewhat sneakily listen in on you:

>When you drop in on your device or a contact's device, the light ring on your Echo pulses green, you connect automatically and can hear anything within range of the device

https://www.amazon.com/gp/help/customer/display.html?nodeId=...

[Xylakant]

Drop in is an optional feature that needs to be explicitly enabled for a list of contacts. It’s not covert if you have to turn it on.

[hammock]

Like I said, we can argue over "covert." But once you allow a contact to drop in on you, they can do it at any time, with no prior warning, and you won't know it until they're already listening to you.