People are dismissing your response, but nobody is addressing your key point that an always-listening phone is far more of a privacy threat than an Echo. And that the Echo doesn't add THAT much more of a threat if you've got a phone that's listening.

I don't agree there's nothing to be done short of building your own SCIF (laws are a logical place to start), but to me it's more important to point out what a privacy disaster all of our phones are that it makes everything else look much smaller.