Without further ado, some citations about the COINTELPRO surveillance program:
"The Committee finds that the domestic activities of the intelligence community at times violated specific statutory prohibitions and infringed the constitutional rights of American citizens. The legal questions involved in intelligence programs were often not considered. On other occasions, they were intentionally disregarded in the belief that because the programs served the "national security" the law did not apply. While intelligence officers on occasion failed to disclose to their superiors programs which were illegal or of questionable legality, the Committee finds that the most serious breaches of duty were those of senior officials, who were responsible for controlling intelligence activities and generally failed to assure compliance with the law." 
"Many of the techniques used would be intolerable in a democratic society even if all of the targets had been involved in violent activity, but COINTELPRO went far beyond that...the Bureau conducted a sophisticated vigilante operation aimed squarely at preventing the exercise of First Amendment rights of speech and association, on the theory that preventing the growth of dangerous groups and the propagation of dangerous ideas would protect the national security and deter violence." 
"In the need to develop a capacity to know what potential enemies are doing, the United States government has perfected a technological capability that enables us to monitor the messages that go through the air. (...) Now, that is necessary and important to the United States as we look abroad at enemies or potential enemies. We must know, at the same time, that capability at any time could be turned around on the American people, and no American would have any privacy left such is the capability to monitor everything—telephone conversations, telegrams, it doesn’t matter. There would be no place to hide.
If this government ever became a tyrant, if a dictator ever took charge in this country, the technological capacity that the intelligence community has given the government could enable it to impose total tyranny, and there would be no way to fight back because the most careful effort to combine together in resistance to the government, no matter how privately it was done, is within the reach of the government to know. Such is the capability of this technology. (...)
I don’t want to see this country ever go across the bridge. I know the capacity that is there to make tyranny total in America, and we must see to it that this agency and all agencies that possess this technology operate within the law and under proper supervision so that we never cross over that abyss. That is the abyss from which there is no return."  
Sounds familiar? In case you were wondering: no, COINTELPRO isn't the latest NSA program from 2014. It was an FBI program from 1963, during the good old days of J. Edgar Hoover, designed to catch communists. So this is entirely different from today, because this time, we're after the terrorists.