[pvaldes]

This poses an interesting question: couldn't anybody disrupt this devices temporarily inside their property with a personal wifi jammer or something like that? What would be the alexa response in that case?

[angelzen]

I don't know the tech answer.

Socially speaking, I feel rather strongly that it should be elementary courtesy to shut off the panopticon if I visit your spyware-infested house. I didn't consent to Amazon building a profile of me, can you please stop being a creepy asshole on behalf of Amazon?

[elric]

Any kind of jamming equipment is illegal in many places.

So could you? Maybe. Should you? Well, I suspect you're more likely to get punished for jamming frequencies than for spying on people...