If you've got Alexa, Echo, Siri, or any of the other 'in-home voice activated web-based personal assistants', you've already consented to being monitored anyway, and this should be a, 'Meh.'
My curiosity is at the point where the voice monitoring, digital footprint, and 'red flag' laws intersect.
Suppose your Alexa (or even your Denny's monitoring) picks up the words, 'damned government', which triggers a monitoring and reporting routine. The routine picks up more words or phrases that could be connected to planning action -- casualties, attack, escape, firepower -- whatever, or could be connected to a couple of old warriors rehashing old times.
Suppose a scan of your digital footprint finds credit card purchases of things such as dehydrated food, ammunition, night vision devices, camouflage clothing, first aid supplies, cement, etc., connected to you through your credit card, or through the credit cards of people you have called in the days leading up to the monitoring trigger.
Suppose Amazon, in a fit of virtue-signalling intended to get the government to back off monopoly-busting efforts, announces it supports efforts to actively preempt people who might pose a threat to themselves and others. What appears on the surface to be an empty gesture of corporate social justice-ism turns out to be the harbinger of a program that turns over the results of aforementioned monitoring to local authorities to support efforts to take guns from dangerous people in support of red flag laws.
The problem I have with this is that while some people have called this idea, 'paranoid', no one's called it, 'impossible'.