http://news.bbc.co.uk/1/hi/entertainment_and_arts/10317767.stm
Obviously, 545 morons can't figure out that the BBC has no control over noises made by the crowd during a live football game. I mean, did they think the BBC had added them for atmosphere?
That is not true. In fact it is very easy to filter out certain frequencies from a broadcast and vuvuzelas always sound at a specific constant frequency. The local Sky channel here does that, on of its audio tracks the vuvuzelas are almost inaudible, and it almost sounds like normal stadium atmosphere. But of course that's an editorial decision that could be argued either way. [btw. the sound you hear of the spectators in a football stadium are often (if not even usually) edited and influenced by the tv station, they have various methods of doing that with the goal for example of making one team's supporters appear louder. I know for a fact that German tv stations often do that in European Cup matches of German clubs for example.]
google "vuvuzela filter".