VfB Stuttgart and Cologne managing directors Alexander Wehrle and Christian Keller both hope the German Football Federation (DFB) opts against punishing clubs for the fan protests which have dominated matches in recent weeks. Supporters threw tennis balls onto pitches, drove remote-controlled cars with flares onto the field and flew a toy plane over a match to demonstrate against plans by the German Football League (DFL) to bring in an external investor to boost marketing possibilities. Fans felt the move would make Germany’s top two divisions too corporate and their protests seemed to work as…