well theyre banned from Wimbledon and from the Henley Regatta .. but the Cricket is leaving it up to the grounds whether to ban them or not ...
BBC Sport - Tennis - Wimbledon crackdown on vuvuzelas
and heres some facts about em ...
http://news.bbc.co.uk/1/hi/world/africa/10312794.stm
the scary bit being this ..
Has the controversy affected sales?
On the contrary. Neil van Schalkwyk says his firm has sold 1.5m vuvuzelas in Europe since October and expects sales of up to 20 million rand ($2.6m; £1.7m) over the course of the tournament.
Brandon Bernardo of the vuvuzela.co.za website told Reuters news agency they could churn out at least 10,000 instruments a day. "We're completely sold out," he said.
Furthermore, a Dutch designer firm has released a Vuvuzela 2010 app. According to its website, they have had 750,000 downloads of the application.
Even without the World Cup, South Africa's vuvuzela industry is said to be worth around 50 million rand ($6.45m; £4.4m).