Amazon home devices may now use part of your WAN uplink for a mesh network with neighbors’ Amazon Devices

An interesting and unsettling development on multiple levels. First, there
is the technical issue of whether the implementation is truly secure,
including whether information can be deduced from such activity.  Second,
there is a question of propriety. Is it desirable for that level of personal
observation to be transmitted outside the residence.  Thirdly, is taking any
amount of my paid for bandwidth legal and acceptable? An additional, and
perhaps more important question is whether such a feature should be enabled
by default. NOTE: The referenced article contains a number of web references
to The Guardian, Ars Technica, and other mainstream sources.

https://www.newser.com/story/306874/amazon-is-about-to-take-and-share-a-slice-of-your-internet.html