The Officials Abusers are only slicker now
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According to Brian Glick, in War at Home, COINTELPRO used a broad array of methods, including:
1. "Infiltration: Agents and informers did not merely spy on political activists. Their main purpose was to discredit and disrupt. Their very presence served to undermine trust and scare off potential supporters. The FBI and police exploited this fear to smear genuine activists as agents." 
2. "Psychological Warfare From the Outside: The FBI and police used myriad other "dirty tricks" to undermine progressive movements. They planted false media stories and published bogus leaflets and other publications in the name of targeted groups. They forged correspondence, sent anonymous letters, and made anonymous telephone calls. They spread misinformation about meetings and events, set up pseudo movement groups run by government agents, and manipulated or strong-armed parents, employers, landlords, school officials and others to cause trouble for activists." 
3. "Harassment Through the Legal System: The FBI and police abused the legal system to harass dissidents and make them appear to be criminals. Officers of the law gave perjured testimony and presented fabricated evidence as a pretext for false arrests and wrongful imprisonment. They discriminatorily enforced tax laws and other government regulations and used conspicuous surveillance, 'investigative' interviews, and grand jury subpoenas in an effort to intimidate activists and silence their supporters."
4. "Extralegal Force and Violence: The FBI and police threatened, instigated, and themselves conducted break-ins, vandalism, assaults, and beatings. The object was to frighten dissidents and disrupt their movements. In the case of radical Black and Puerto Rican activists (and later Native Americans), these attacks—including political assassinations—were so extensive, vicious, and calculated that they can accurately be termed a form of official 'terrorism.'". 
Supporters of the FBI argue that the Bureau was convinced that there was such a threat of domestic subversion posed by radical groups that extraordinary efforts were required to forestall violence and revolutionary insurgency. Hoover was willing to use false claims to attack his political enemies. In one memo he wrote: "Purpose of counterintelligence action is to disrupt the Black Panther Party and it is immaterial whether facts exist to substantiate the charge."
In 1969 the FBI special agent in San Francisco wrote Hoover that his investigation of the Black Panther Party revealed that in his city, at least, the Black nationalists were primarily feeding breakfast to children. Hoover fired back a memo implying the career ambitions of the agent were directly related to his supplying evidence to support Hoover's view that the BPP was "a violence prone organization seeking to overthrow the Government by revolutionary means".
In one particularly controversial incident, civil rights worker Viola Liuzzo was killed in 1965 by a shot from a car in which four Ku Klux Klansmen were riding; one of the Klansmen was an FBI informant. Afterward, COINTELPRO spread false rumors that Liuzzo was a member of the Communist Party and had abandoned her children in order to have sexual relationships with African Americans involved in the civil rights movement. 
 Illegal surveillance
The Final report of the Church Committee concluded:
- "Too many people have been spied upon by too many Government agencies and too much information has been collected. The Government has often undertaken the secret surveillance of citizens on the basis of their political beliefs, even when those beliefs posed no threat of violence or illegal acts on behalf of a hostile foreign power. The Government, operating primarily through secret informants, but also using other intrusive techniques such as wiretaps, microphone "bugs", surreptitious mail opening, and break-ins, has swept in vast amounts of information about the personal lives, views, and associations of American citizens. Investigations of groups deemed potentially dangerous -- and even of groups suspected of associating with potentially dangerous organizations -- have continued for decades, despite the fact that those groups did not engage in unlawful activity. Groups and individuals have been harassed and disrupted because of their political views and their lifestyles. Investigations have been based upon vague standards whose breadth made excessive collection inevitable. Unsavory and vicious tactics have been employed -- including anonymous attempts to break up marriages, disrupt meetings, ostracize persons from their professions, and provoke target groups into rivalries that might result in deaths. Intelligence agencies have served the political and personal objectives of presidents and other high officials. While the agencies often committed excesses in response to pressure from high officials in the Executive branch and Congress, they also occasionally initiated improper activities and then concealed them from officials whom they had a duty to inform.
- Governmental officials -- including those whose principal duty is to enforce the law --have violated or ignored the law over long periods of time and have advocated and defended their right to break the law.
- The Constitutional system of checks and balances has not adequately controlled intelligence activities. Until recently the Executive branch has neither delineated the scope of permissible activities nor established procedures for supervising intelligence agencies. Congress has failed to exercise sufficient oversight, seldom questioning the use to which its appropriations were being put. Most domestic intelligence issues have not reached the courts, and in those cases when they have reached the courts, the judiciary has been reluctant to grapple with them." 
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