And I know how to make sure they never get to see anything you don't want them to. Don't delete any more of your spam..
I believe the US intelligent service employees are about to become unparalleled experts in a varying fields of knowledge vital to law enforcement worldwide. Without doubt they will be the people to call if you need to know anything about penis enlargement, pornography, pain killers, fake Rolex watches and dodgy stock deals.
The only way you should be worried by this, is if you think they're already interested in you. Because if you think they are going to find anyone new to look at by sifting through an entire nation's spam, perhaps you believe in Father Christmas too? I would have doubts on their ability to find anything remotely useful even if they employed every single person in the entire world.
Oh that's right, they think they have a program that'll do it for them.. excuse me while I rofl. Hmm, probably going to be something along the lines of seti at home but with more data. I wonder if there are enough xenophobes and security nuts in the world to actually make a distributed computing project like that find a genuine terrorist within our lifetimes.
None of that makes it okay of course, it's just for me the entire thing is so implausible and the only reason they would want to do it is if they already have their suspects and want to grab their online activity.
Of course what they're really asking for is the legalisation of VOIP wiretaps at will.. now that SHOULD have you worried, because unfortunately by tying it to the internet (and we all know that only pervs, weirdos and terrorists use the internet) they can foist an unconstitutional law onto a technologically ignorant nation, who will wake up in ten years and realise they allowed the NSA to wiretap every single one of them without even the farcical process of getting a warrant.