There is no fundamental difference between the NSA’s data mining and eavesdropping operations and a live in agent listening to all your conversations and downloading your browser history. We are all harboring a governmental presence in our homes, without our consent, in what I believe to be a direct violation of the Third Amendment; if our founders were here today I believe they would agree.The obvious objection is that you have consented to bringing in the internet into your home, by taking the positive action of purchasing services to do so. You've agreed to impossible-to-read Terms of Service that may even say, "...and we'll spy on you relentlessly and sell your secrets to the government," for all you know because no one actually reads those things. On the other hand, nobody can prove it was you who clicked "OK," which makes it pretty dodgy as a contract.
Or maybe they can, since they can track your cellphone in real time to the room in which the "OK" box was clicked...
I don't know that there's a straight Third Amendment claim that can fix this, though I laud them for the attempt. But we do need walls. We need to think about just where and how to build them. The government is always more dangerous to us than our enemies are. It has already all the power over us that they only dream of winning at the conclusion of a long and painful war.