Personally I think football should be broadcast without a commentary anyway, any football fan who is too stupid to know what is happening just by watching should get a radio. Of course there are blind or part sighted fans to consider so possibly my argument does not stand up.
I seem to remember that the BBC had the option of no cometary during the last world cup... (red button) but there was no option other than Mute to get shut of those bloody vuvuzelas (sp) kazoo things.