Liberals and libertarians have been decrying the Patriot Act for years now, and even though that time period has seen me go from "conservative" to "stark raving mad anarcho-capitalist" I still haven't really felt like there's been anything to get upset about. So far, I hadn't heard real evidence that civil liberties of non-terrorists had been curtailed in meaningful ways.
You can tune a piano, but you can't tuna fish. You can tune a filesystem, but you can't tuna fish. -- from the tunefs(8) man page