Organizations accused of eco-terrorism are generally
grassroots organizations, do not have a hierarchal structure, and typically favor
direct action approaches to their goals. Essentially this consists of independent cells which operate autonomously, sharing goals, but having no central leaders or formal organizational structure. Those who wish to join are typically encouraged to start their own cell, rather than seek out other members and jeopardize their secrecy. the
Earth Liberation Front (ELF), In 2010, the FBI was criticized in
U.S. Justice Department reports for unjustified surveillance (and placement on the Terrorism Watchlist) of about 2000 members of animal rights and environmentalist groups such as
Greenpeace and
PETA. In a 2002 testimony to the
US Congress, an FBI official mentioned the actions of
Sea Shepherd Conservation Society in the context of eco-terrorism. In 1990, Earth First! organizers
Judi Bari and
Darryl Cherney were injured when a motion-detecting pipe bomb detonated beneath Bari's driver seat. Authorities alleged that the bomb was being transported and accidentally detonated. The pair sued investigators, alleging false arrest, illegal search, slanderous statements and conspiracy. In 2002, a jury found that FBI agents and Oakland police officers violated constitutional rights to free speech and protection from unlawful searches of Earth First! organizers. The Earth Liberation Front, founded in 1992, joined with the Animal Liberation Front, which had its beginnings in England in 1979. A banner left at the scene claimed the housing development was not green as advertised, and was signed ELF. In September 2009 ELF claimed responsibility for the destruction of two radio towers in Seattle. The
FBI in 2001 named the ELF as "one of the most active extremist elements in the United States", and a "terrorist threat." A number of "local" organizations have also been indicted under US Federal laws related to eco-terrorism. These include, among others, the group
Stop Huntingdon Animal Cruelty. Another example is the Hardesty Avengers who spiked trees in the Hardesty Mountains in
Willamette National Forest in 1984. Unclear, however, is the extent informants and controversial FBI entrapment operations play in creating eco-terrorist groups and furthering criminal acts. In 2015, so-called "green anarchist"
Eric McDavid was freed from a 2007 conviction after it was disclosed the FBI operated a program to lure unsuspecting activists via "blatant entrapment." The 2007 conviction had been cited by the FBI in its 2008 claim eco-terrorism was a significant threat. The
National Animal Interest Alliance in their animal rights extremism archives compiled a comprehensive list of major animal rights extremist and eco-criminal acts of terrorism since 1983. ==US Government's response==