Who started “Vuvuzela at the 2010 World Cup”?

World Cup spectators, on TV, Jun 11, 2010. It reached 7 platforms in 4 weeks.

LineageContestedKey steps, 9 of 10. Lines follow time and platform
World Cup spectatorsFirst postWorld Cup organising committeePressSainsbury's / horn suppliersRetailObserved peakBacklashPlatform jumpPlatform jumpPressPressPatient zero