I have been reading some of the posts here and frankly I am astonished by some of the naivety. IMO what the NSA is doing is both illegal and unconstitutional, for multiple reasons. Even the 'foreign surveillance' net the NSA casts will include people like me US citizens living overseas.
The simple truth is that this erosion of freedom does nothing to stop terrorism. Instead, it revels the West as the biggest bunch of hypocrites on the planet. To the extent extremists are a threat, this will only stoke their fires. But honestly, most extremists are bungling, incompetent morons who pose less of a threat than drunken drivers. We ask our military personnel to take risks to protect our way of life. I, for one, am willing to risk an occasional act of terrorism if it means the government doesn't screen everything I do on the net ... like this post.