People usually bully folks on the soccer discipline. Many professionals cowl their mouths in order to not entice consideration from referees and cameras. A stricter rule now applies throughout the World Cup.
https://www.spiegel.de/sport/fussball/gefluche-hinter-vorgehaltener-hand-das-kann-kuenftig-die-rote-karte-geben-a-a0de159e-9f16-491f-a5e3-3e5626817961#ref=rss