The NSA cannot and does not collect info on U.S. Citizen's on it's own accord. The folks that work at the NSA are professional, decent hardworking Americans. They have no malicious agenda and should not be feared. The purpose of the NSA is to protect the country against an attack.
May I point out if a U.S. Citizen called a foreign target that was being monitored then it doesn't require a warrant. The caller then just pretty much identified himself as a foreign agent and that his identification must be handed over to the FBI or U.S. Attorney's office.
However, deliberately monitoring a U.S. Citizen's home phone requires a warrant and that is a law enforcement problem. Don't mix apples and oranges here.
