A phone-free Yellow Wall: are Dortmund urging fans to be present or policing them?

It makes sense that sports teams want to keep influencers out of their games. The battle some clubs are waging with their fans, however, is a different dilemma By all appearances, things on the Yellow Wall seemed as they always had been. The stadium announcer hollered out the first names of Borussia Dortmund’s starting lineup and the supporters responded with their last names, tens of thousands of voices bellowing as one. Dozens of black and yellow flags waved over Europe’s largest standing terrace, a mass of faces fixed on the field beneath them. And then Signal Iduna Park, sold out with…

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