They're awful and ruining the experience.
I've watched all the games so far and after a while you are able to zone them out somewhat.
The bad thing is however that they completely overpower all other sounds in the stadium.
The English lone trumpeter,the Mexican instruments,and no doubt the Brazilian samba drums when they will play and so on.
We can't hear chants,songs or even the "ooing and awing" of the crowd during attacks and chances.
Just that constant,annoying,boring drone.
I really hope some people get pissed off and throw their vuvuzelas at some players,then FIFA are held by their regulations to ban them all.
If they refuse to then,they will look like right idiots.
The fact they affect the players' ability to communicate should be reason enough to ban them.
However,I don't see FIFA banning them anyway.
For a number of reasons.
#1)That fool Sepp Blatter said FIFA are supporting African culture for the tournament,and the vuvuzelas are obviously a part of this.
2)The South Africans are very touchy about being told what to do by Europeans(they're still touchy on the whole colonisation thing),so any bans would probably be very hard to enforce,would be met with widespread protest etc,especially as they are the home nation.
Not to mention it's not just South Africans doing it anymore,even if they are the majority.
3)FIFA had problems selling tickets for games,especially group games,and when foreign countries were returning their ticket allocations it was South Africans who bought them up,and that sort of saved FIFA from the embarrassment of empty seats.
(This is why we see South Africans at games,not even looking at the game and just dancing around and blowing them damn horns)
Fifa won't piss off these people after they bought the tickets for them.
Hopefully they will be banned from whenever South Africa get knocked out,not likely though.