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The Headhunters, have rivalries with counterparts who follow other London teams, such as Arsenal, Millwall, Queens Park Rangers, Tottenham Hotspur and West Ham.

There has been widespread racism amongst the gang and links to various violent organisations, such as, The Infants, Combat 18, and the National Front and to Northern Irish loyalist paramilitary organisations, such as the Ulster Defence Association and Ulster Volunteer Force.


They were infiltrated by investigative reporter Donal MacIntyre for a documentary screened on the BBC on 9 November 1999, in which MacIntyre posed as a wannabe-member of the Chelsea Headhunters. He had a Chelsea tattoo applied to himself for authenticity, although the hardcore were surprised he chose the hated "Millwall lion" badge rather than the classic 1960s upright lion one. He confirmed the racist elements in the Headhunters and their links to Combat 18, including one top-ranking member who had been imprisoned on one occasion for possession of material related to the Ku Klux Klan. The programme led to arrests and several convictions. One member of the Headhunters, Jason Marriner, who was convicted and sent to prison as a result of the show, has since written a book claiming to have been set up by MacIntyre and the BBC. He claims that footage was edited and manipulated, and 'incidents' were manufactured and they were convicted despite having no footage of them committing crimes.

Nick Love's film, The Football Factory, presented the Headhunters in a fictionalised account. The film focuses mainly on the firm's violent rivalry with the Millwall Bushwackers.

One of the most notorious members of the firm is Kevin Whitton who was sentenced to life imprisonment on 8 November 1985 for violent assault after being found guilty of involvement in an attack on a pub on Kings Road which was described as being some of the worst incidents of football hooliganism ever witnessed in England. After Chelsea lost a match, Whitton and other hooligans stormed into the pub chanting "War, war war". When they left a few minutes later the American bar manager lay close to death, with one of them shouting, "You bloody Americans. Coming here taking our jobs." Another member of the gang received a 10-year prison sentence at the same trial. In 1987, Terence Matthews (aged 25) received a four-year sentence for his role in the same attack.