You're correct about the power and communications. Consider, however, the agent or pervert next door who uses this to spy on you.
And your point is? If the nefarious agent wants to spy on me he can already do that without me knowing about it, especially if he has state backed solutions to do things like install surveillance gear anywhere in and around my house, or even inject code into my laptop and watch the webcam to see what I am doing. And if he really wants to spy on me he has the budget to do so.
The pervert has less ability to access the internals of my house and or computer, but can still easily put up surveillance gear external to my house to see anything that is easily viewable, and again I won't know.
Also consider in what devices such a thing may be implanted.