Borussia Dortmund fans watch a game in the team's supporters' section.
Dortmund fans were incentivized to keep their phones away for a recent home match against Eintracht. Photograph: Leon Kuegeler/Reuters
Dortmund fans were incentivized to keep their phones away for a recent home match against Eintracht. Photograph: Leon Kuegeler/Reuters
A phone-free Yellow Wall: are Dortmund urging fans to be present or policing them?Leander Schaerlaeckens

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