What do you think about National Security Letters?

A provision of the Patriot Act is the ability for the CIA, FBI, etc. to issue an administrative subpeona and request information about you from just about anywhere if you are considered a “security risk” (nothing has to be done to prove you are a security risk.) There is a gag order associated with the letter; the person receiving the letter cannot tell anyone they received a letter, cannot refuse to turn over the information, and cannot even consult an attorney about refusing to provide the information. All due process is stripped away; there is no court order associated with the issuance of the letter.

Do you think government agencies should be be exempt from due process.?