But they're so tres sophisticated...
The first meeting in the American football rivalry between Brigham Young University and the University of Utah took place in April 1896, when BYU was known as Brigham Young Academy. The two schools disagree to this day as to whether this game was official, but it mattered greatly to the spectators—at the end of the game, the two sets of fans fought one another.
On August 12, 1984, during a game between the Atlanta Braves and San Diego Padres that degenerated into a beanball war:
At least five fans were dragged from the field at Atlanta–Fulton County Stadium in handcuffs after participating in a bench-clearing brawl.
One of the fans was charged with assault for throwing a full beer mug at the Padres' Kurt Bevacqua, hitting him in the head, as he was returning to the dugout.
The game ended with police riot squads on top of both dugouts in an obvious attempt to keep fans away from the players.
At the end of the same season, violence erupted outside of Tiger Stadium in Detroit after the Detroit Tigers defeated the Padres in the World Series. A well known photo from the riot shows a Tigers fan holding a World Series pennant in front of an overturned burning Detroit Police car.
In 1998, Denver Broncos fans rioted in the streets of Denver after their team won Super Bowl XXXII. Near-riots happened when the team won the Super Bowl again the following year and after the Colorado Avalanche's Stanley Cup wins in 1996 and 2001.
A similar incident occurred in Oakland, California in 2003 when fans rioted and destroyed property after the Oakland Raiders lost to the Tampa Bay Buccaneers in Super Bowl XXXVII.
In June 2000, Los Angeles Lakers fans stormed the streets of Los Angeles after the Lakers victory over the Indiana Pacers in the 2000 NBA Finals. Fans briefly celebrated by starting bonfires, but it soon turned into a riot, with fans dancing and stomping on parked cars, and even turning a news van over
In October 2004, fans of the Boston Red Sox rioted just outside of Fenway Park after the Red Sox won the American League Championship Series over the New York Yankees. Police used "pepper guns" in some cases and an Emerson College student, Victoria Snelgrove, was killed by a pepper filled paintball-like projectile which hit her in the eye.
On November 19, 2004, near the end of an NBA game between the Indiana Pacers and Detroit Pistons, a brawl erupted between Pacers players and Pistons supporters.
August 21, 2011 An assault victim and a shooting victim remain in serious condition after a violent night at Candlestick Park Saturday, according to officials at San Francisco General Hospital.
Three people were hospitalized after two men were found shot in the parking lot at around 8 p.m., and another man was beaten unconscious in a bathroom inside the stadium between 7:15 and 7:30 p.m.
The incidents happened during a preseason football game between the Oakland Raiders and the San Francisco 49ers.
Football fans fight in the stands during the exhibition game between the 49ers and Raiders in San Francisco. After two men were shot and wounded following the game, the NFL and the mayors of the two cities jointly called for an end to "intimidation" and acts of violence at sporting events.
It's pretty sobering that blatant racism like this and other incidences, like fans throwing bananas and mimicking apes at players of African descent, are par for the course throughout Europe.
(What language is that remark supposed to be?)