World Cup organisers could ban vuvuzelas from inside stadiums after complaints from broadcasters, players and fans.
The noise has been likened to a herd of stampeding elephants or the drone of a thousand bees.
Local fans say the honking horn is part of South African football-supporting tradition, and the vuvuzela plays the part of a 12th man for the Bafana Bafana team.
But critics say it is a danger to hearing and drowns out the singing loved by so many international supporters.
And others say it is just plain annoying.
Fans arriving at OR Tambo Airport are greeted straight of the plane with loud blasts echoing around the arrivals hall.
And over enthusiastic blowers have woken many a travelling fan before day even breaks.
Some South African shopping malls have already banned the trumpets and World Cup organising chief Danny Jordaan has spoken of the possibility of banning vuvuzelas from inside stadiums.
Asked if he would get rid of them, he told BBC Sport: "If there are grounds to do so, yes. We did say that if any land on the pitch in anger we will take action."
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