Stardock (LINK: http://www.stardock.com/ (http://www NULL.stardock NULL.com/), a pc software company specializing in Windows experience software and PC games, has come up with a filter to block the sound of the VuVuzela for those watching any of the online streams of the World Cup.  The filter called Devuvuzelator does not require actual installation can be downloaded at (LINK) http://www.stardock.com/labs/devuvuzelator/ (http://www NULL.stardock NULL.com/labs/devuvuzelator/)

Here is the explanation from the site about the Devuvuzelator

I tried it with one of this mornings matches and it works very well.  Unfortunately this software is Windows only.