Following the Battle of Bramall Lane in 2002, in which a Division One fixture against West Bromwich Albion was abandoned due to having only six players left on the pitch, fans of the two clubs were involved in fighting outside the ground.
[citation needed] In May 2011, Blades hooligans threw missiles at visiting Barnsley fans at Sheffield station following the clubs' relegation from the Championship.
[5][failed verification] In March 2012, four members of the firm attacked a group of teenage Brentford fans after the League One clash at Griffin Park.
The book, Blades Business Crew: The Inside Story of a Football Hooligan Gang, published in 2002, was written by a member of the firm, Steve Cowens, who had been associated with them since the early 1980s.
As well as informing readers about the activities of the Blades Business Crew, he also told stories of numerous other football firms, including those of smaller and less well known clubs.