The new legislation would allow government to spy on First Amendment-protected activities. By applying an overly broad definition of terrorism, organizations using protest tactics such as those used by Operation Rescue or protesters at Vieques Island, Puerto Rico would become victims of criminal wiretapping and other electronic surveillance. In addition, the act would terminate court-approved limits on police spying, which were initially put in place to prevent McCarthy-style law enforcement persecution based on political or religious affiliation.
The new act would radically diminish personal privacy by removing checks on government power. It would permit, without any connection to anti-terrorism efforts, sensitive personal information about U.S. citizens to be shared with local and state law enforcement. In addition, the government could gain secret access to credit reports without consent and without judicial process.
The new bill would increase government secrecy while diminishing public accountability. It would authorize secret arrests in immigration and other cases, such as those involving material witness warrants, where the detained person is not criminally charged. The act would allow for the sampling and cataloguing of innocent Americans' genetic information without court order and without consent. And, incredibly, the act would shelter federal agents engaged in illegal surveillance without a court order from criminal prosecution if they are following orders of high Executive Branch officials.
http://www.aclu.org/SafeandFree/SafeandFree.cfm?ID=11904&c=206