If George Washington Were Alive, He'd be Reading Your Email

Doubt it. Writs of Assitance (http://en.wikipedia.org/wiki/Writ_of_assistance) were widely abused by the Crown in Colonial North America, no?

This is the worst kind of "Originalism".

How about we get away from what Madison may or may not have thought about a technology 200 years in the future, and look at what mass surveilance inevitably does, namely become an instrument of repression. At the very best, mass surveillance is going to become an instrument of stasis, maintaing the status quo in a war on the unexpected, but that's really the best we can hope for. Thank your lucky stars if you don't have anything to hide (like a dissident religion or Arab ancestors or you didn't make it into CxO level position) because the rest of us are going to be in trouble.