I remember watching football years ago and the refs would actually call a penalty on the home team sometimes when the crowd got so loud that the offense couldn't hear. I don't remember ever reading that they got rid of the rule, but crowds are insanely loud now and teams like the Seahawks have even designed their stadium to amplify the crowd noise. QB routinely have to go to the silent count. And yet no penalties are ever called. Did the NFL get rid of the rule or do they just ignore it? And if they just ignore it, why don't they just get rid of it if they're not going to call it?