No matter the sport, no matter the venue, they will be there.
"They," of course, being awful, no-good, rotten and incorrigible sports fans hellbent on ruining everything for everyone.
Their existence is almost a natural law, and wherever sports are played, at least one species of bad fan will be in attendance, doing their best to give everyone who has ever paid money to watch organized athletics a bad name via their sheer numbskullery.
The following is an updated ranking of the 10 worst varieties of fan you can encounter in American sports in the Year of Our Lord 2017.