Per this disturbing article from the New York Times, none of the 1,800 surveillance applications handled by the FISA Court last year was denied. While that in itself is disturbing, the worst is what happens next:
The judges have also had to intervene repeatedly when private Internet and phone companies, which provide much of the data to the N.S.A., have raised concerns that the government is overreaching in its demands for records or when the government itself reports that it has inadvertently collected more data than was authorized, the officials said. In such cases, the court has repeatedly ordered the N.S.A. to destroy the Internet or phone data that was improperly collected, the officials said.