I think when it gets too loud, all one hears is noise. Envision a stadium; sports arena. Everyone is talking, can hear the hum or the buzz; don't know what anyone is saying. All you know is they're saying something. It would be strange if there was a goal and nobody cheered; a bad play by the opposing team and nobody booed. Since it's so normal, silence would say more.

I can't see society coming together with quiet confidence and discipline though. So when the space rock is on its way, the world will just try to yell it away.