I love stadium sounds and I usually hate when broadcasters cut out all the crowd singing, etc. BUT the vuvuzelas are in such number than instead of making single horn sounds it's just a 100% BZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZzzz all the game. When you watch one game, it's ok, when you watch more, or all the games, it's annoying as hell, rly.
It's very different when you're at the game - the vuvuzelas near you are distinguishable and you can hear people singing.
Obviously that's not ideal for watching it on tv - the vuvuzelas tend to drown everything else out when it's all recorded - but I'm not sure what the ideal solution is, because there's no way that anyone here in South Africa would accept a ban.