• It's the fans generating the most excitement at stadiums this summer. • Audience members caught on camera are going viral worldwide. • Most famously, Astronomer's CEO resigned after footage of him at a Coldplay concert.

Smile! You are almost definitely on camera.

At stadium events this summer, from concerts to baseball games to the US Open, it's the fans who are providing the most talked-about moments.

The ubiquity of cameras, the ones casting to jumbotrons and the ones in everyone's pocket, means no one is safe from scrutiny any longer — and that means fans can go viral anywhere at any time, even if they are not the main attraction.

Most recently, social media users zeroed in on a tense moment between baseball fans on Friday when the Philadelphia Phillies faced the Miami Marlins

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