The New York Times' Rob Hughes reports on the twentieth anniversary last week of "The Day That Soccer Died." Soccer fans, especially in Europe, refer to it only as "Hillsborough." 96 people were trampled to death at an English FA Cup Semifinal.
The old style of British venue didn't help prevent deathly incidents like this; I never went to a British stadium in the 80s or 90s but as I understand it, fans were herded like cattle into pens lined with steel fences; I can't even think of a U.S. equivalent. The riotous nature of fans in those days (and to this day, as this sort of thing still occasionally happens) speaks to the rabid passion of soccer people, but is also probably the darkest side of our sport.