Seriously though, this is a real concern. How do you build a house that is raid proof but that can be accessed by the fire dept? Maybe we should push the context of the problem back a little bit and ask: how do we de-escalate the police state in the U.S.?
Given the apparent change in officer behavior that accompanies body camera use, perhaps having explicitly noted video and audio surveillance disclosed in advance will serve a similar purpose.
It looks like this was overturned in 2014.
http://en.wikipedia.org/wiki/Illinois_wiretapping_law#Court_...
http://www.washingtonpost.com/news/volokh-conspiracy/wp/2014...
n.b. I learned about this in a recent episode of "The Good Wife". I am Canadian.
The scenario we're covering here is for police inside your house, which I'm pretty sure wouldn't be considered public.