I don't think it's as it's being written up. IF they are talking about a system to get all the info that they have Anyway in one place, then I guess I can't get too upset about that.
Turns out "they" we, whoever, knew a LOT about the people who hijacked all those planes last year, but the information didn't get put into one place to make a picture.
But no, the technology for what we've been describing here doesn't exist here and now. Not yet, anyway. It's just too much. In order to track emails as such, you'd have to put a program on every ISP in the world, and that's just a massive undertaking. My daughter, her boyfriend and I set up a new ISP last year, for instance. (We figured it was either an interesting afternoon of unix programming or perhaps a multi-million dollar startup, who knows? Well, okay, it was an interesting afternoon)
In fact, if information is transmitted, it's public here and now. If you talk on a cell phone or even on your cordless extension of your landline phone, anybody who wants to can hear you. I'd guess that if your ISP uses satellite then anything you send can be seen right now.
But listening to every phone conversation and looking at every email would just be too expensive/time consuming/unproductive even for the government!
But I'd be keeping a good check on our representatives and senators to let them know that IF they're thinking about doing it as the massive information-gathering process we've been describing, that their career will end before it's ever set up.