Bit late to chip in, but people might be interested in "The Light of Other Days" by Stephen Baxter / Arthur C Clarke. As far as I remember, it posits a device (some sort of wormhole jobby) which in its final iteration allows the user to observe any point in space, at any point in time. Because the technology becomes cheaply available, anyone can check out any event, any person, etc. As I recall they did an interesting job of working out the implications of this.
Like The Demolished Man, I guess (haven't read it), except the tools for privacy invasion / truth determination (depending on your point of view!) are freely available to all. Fun story.