2010 FIFA WC fame Vuvuzelas may be banned in South African football grounds unless Kaizer Chiefs fans improve their behaviour.
At a recent cup game, supporters of the country's most popular club threw two vuvuzelas and a cabbage onto the pitch.
Chiefs have been handed a suspended fine of US$72,130, while their chairman was ordered to make a public apology.
"Should vuvuzelas continue to be used as missiles they could be banned," the Premier Soccer League's prosecutor Zola Majavu said on Thursday.
During the 2010 Fifa WC, many wished that vuvuzelas had been banned, however, thousands of supporters took vuvuzelas to games, with many visiting fans purchasing an item that came to symbolise the 2010 World Cup.
Chiefs fans, meanwhile, have taken credit for making the noisy plastic vuvuzela trumpets a popular part of South African football culture.