It has been reported that an Amazon Echo device recorded and then sent out a husband and wife's private conversation without their permission. The Alexa-enabled smart speaker sent the audio file to a random contact who just happened to be an employee of the husband, who then warned them about the surreptitious recording.
https://www.notebookcheck.net/Amazon-Echo-device-records-and-sends-private-conversation-without-permission.305318.0.html