Show me one case where they've stopped an IMMEDIATE threat with the Patriot Act, wiretapping, etc. There hasn't been a SINGLE case where this has helped, because if they had stopped something important, you can be sure they would be trumpeting it as a success and saying, "See public, THIS is why we do what we do! Trust us, we know what we're doing!" But in 4 years, not a single major success story based on PATRIOT, NSA, etc.
It's just not necessary. Play within the system, please.
Another case where the FBI tried seizing computers from a library without a warrant:
http://yro.slashdot.org/article.pl?sid=06/02/01/1451221
Kudos to the librarian/director who said, "No, get a warrant first."
CW