Our pick as the greatest in-stadium tradition is one that almost was done away with by the PC Police at the NCAA.
A few years ago, we all recall the warpath the folks in Indianapolis, Indiana went on by trying to abolish any reference to Native Americans. Despite no widespread complaints made to the NCAA, the association took it upon themselves to force schools to change their team nicknames, logos and even traditions.
Some programs, like the University of North Dakota Fighting Sioux, have fought the NCAA at every turn with legal action (including a state law passed in North Dakota ordering the school to continue to use the nickname and Indian head logo, and a ballot measure putting the issue directly to the people of North Dakota). The NCAA has since told North Dakota it risks forfeiting any postseason games in which the word “Sioux” appears, and North Dakota will not be allowed to host NCAA-sponsored events (such as postseason games).
Thankfully, the Seminole tribe's government in Florida passed a resolution supporting the usage of “Seminoles” in Florida State's traditions.
Because of the historic and praiseworthy vote of the Seminole Tribe of Florida, we still have the coolest, most fearsome tradition in college football today.
Before each game, Chief Osceola—the mascot of Florida State—rides out onto the field with the traditional weapon of a Seminole: a spear (not a tomahawk). Chief Osceola rides to the center of the field and plunges his flaming spear into the field as the crowd howls its approval.
What could possibly be cooler than that?