"When we're less accountable we tend to behave in ways we wouldn't," he said. "If I'm among thousands of celebrating people and I were to throw a beer bottle against a brick wall, you'd have a hard time picking me out."
Real-world examples of such anonymous and abnormal behaviors can be seen each year on Halloween. The holiday also carries an expectation of mischief that may be increasingly prevalent at championship-level sporting events.
My Team, My Life
Experts say fan identification with sports teams is psychologically important for many people, particularly in our increasingly transient and insular society.
Grieve, of Western Kentucky University, said the thinking is akin to "I have a group of friends who are like me because we root for the same teamthat gives me a network of valued connections."
"Identification with a team gives you a kind of social support network that provides a buffer from things like anxiety, loneliness, and depression," he said. "There's also evidence that people who have established social support networks have some protection against physical illness. There are a whole host of benefits."
Such group identities can become especially intense in the crucible of a big sporting event when the entire group is charged with adrenaline.
"When tens of thousands of people are chanting 'We're number one,' wearing team apparel, our group identity is strong and we want to fit in," End noted.
"So if we see someone throw a beer bottle and it draws cheers from our group members who we're really identifying with at the time, we might be apt to match that behavior or up it," he added.
"You can see it with heckling, if people laugh and provide reinforcement, others act out that way."
In this way actions can escalate from to cheering to criminal behavior.
While alcohol is also often cited for its role in such incidents, it may not be the most important factor, End believes.
"Alcohol plays a role, and sometimes it's pointed out as the ultimate villain, the sole contributor," he said. "But there are a lot of other things going on. They serve alcohol at church socials and in the theater, but you don't see these kinds of behaviors."
It's worth noting that while riots tend to paint sports fans in a bad light, millions of fans enjoy games each year without ever becoming involved in destructive activities. In fact, there is question about just how many rioters are fans at all.
"What we typically define as a sports fan is someone who has a psychological connection to the team," End said. "Now we don't go to a place where a riot is happening and ask people questions while they are flipping over a carso it's hard to know" whether the rioters are all fans. "But some people are likely taking advantage of an opportunity. It has happened in the past," End said. He added hypothetically, "There's a TV store down by [Detroit's] Palace at Auburn Hills [arena] and [rioters] want a flat screen TV, so they are going to get one."
"If you look at the stats of violence in society right now, [sports] parallels what's going on in society," noted Najimy of Northeastern University. "The more violent society gets, the more violent sports get. It's tragic, it's horrible, but it's not surprising."
So what can be done to ensure that the euphoria of victory isn't marred by violence?
Experts say anticipation and law-enforcement planning can help control riot situations. But once riots begin, they are notoriously unpredictable.
It may be the fans themselves who can best prevent such incidents. Peer pressure can curb unruly behavior before it begins to escalate.
"If the group says, Hey don't do that, if they point you out to security, you're gaining disapproval from this group that's very important to you," End said.
"I think the fans, as well as the coaches and players, have to communicate that this isn't the appropriate way to cope, and that if we see it happening, we're going to hold you accountable," he added.
The media may also play a role. While networks endlessly loop sensational video of rioting fans, they rarely follow up to ensure that the public is aware of expulsions, arrests, and other real consequences of such behavior.
Perhaps the best advice is for fans to simply relax a biteasier said than done for some.
"You're finding satisfaction in a team that you're not finding in your own life," Najimy said. "When people lose perspective, that's when the trouble starts. Don't take the game too seriouslyit's not your win or loss, it's the team's."
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