On the internet, triggers are everywhere. For victims of abuse, racism, sexism, and other forms of prejudice, as well as those—like soldiers—who've lived through traumatic events, these online emotional triggers are very real and can sometimes lead to negative physical reactions. For these people, there's little that's funny about online triggers.

But those aren't the only people who are able to be triggered. Sports fans are often regularly bombarded with triggers on the internet, many times leading them to get hilariously #madonline. They may have experienced a traumatic event that led to them having such overreactions (like blowing a 3-1 lead in the NBA Finals), but, let's face it, it's only sports. It's not that serious. And since it's not a matter of social injustice or life or death, the response is often funny.

This is a list, originally published in 2016 and updated in early 2019, about those fan bases that are most easily provoked online by words, videos, memes, etc. It's not only about passion—Green Bay Packers fans are very passionate but often too Midwestern polite to linger in your Twitter mentions with blind rage and vitriol. This is about the fans who will tweet you 12 consecutive times totally unconcerned with whether you respond or not. This is about the fans who will curse you out on Facebook, caring little if their family and friends see them using the C-word to describe a complete stranger. This list is for those who get irrationally angry #onhere. These are the most easily triggered fan bases in sports.